Bump the backend group with 6 updates

Bumps the backend group with 6 updates:

| Package | From | To |
| --- | --- | --- |
| [org.springframework.boot:spring-boot-starter-parent](https://github.com/spring-projects/spring-boot) | `3.1.7` | `3.2.2` |
| [org.springframework.boot:spring-boot-dependencies](https://github.com/spring-projects/spring-boot) | `3.1.7` | `3.2.2` |
| [org.springframework.boot:spring-boot-maven-plugin](https://github.com/spring-projects/spring-boot) | `3.1.7` | `3.2.2` |
| [io.asyncer:r2dbc-mysql](https://github.com/asyncer-io/r2dbc-mysql) | `1.0.6` | `1.1.1` |
| [com.kohlschutter.junixsocket:junixsocket-mysql](https://github.com/kohlschutter/junixsocket) | `2.8.3` | `2.9.0` |
| [com.kohlschutter.junixsocket:junixsocket-native-common](https://github.com/kohlschutter/junixsocket) | `2.8.3` | `2.9.0` |
| [com.kohlschutter.junixsocket:junixsocket-native-common](https://github.com/kohlschutter/junixsocket) | `2.8.3` | `2.9.0` |
| [org.springframework.boot:spring-boot-maven-plugin](https://github.com/spring-projects/spring-boot) | `3.1.7` | `3.2.2` |


Updates `org.springframework.boot:spring-boot-starter-parent` from 3.1.7 to 3.2.2
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.7...v3.2.2)

Updates `org.springframework.boot:spring-boot-dependencies` from 3.1.7 to 3.2.2
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.7...v3.2.2)

Updates `org.springframework.boot:spring-boot-maven-plugin` from 3.1.7 to 3.2.2
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.7...v3.2.2)

Updates `io.asyncer:r2dbc-mysql` from 1.0.6 to 1.1.1
- [Release notes](https://github.com/asyncer-io/r2dbc-mysql/releases)
- [Commits](asyncer-io/r2dbc-mysql@r2dbc-mysql-1.0.6...r2dbc-mysql-1.1.1)

Updates `com.kohlschutter.junixsocket:junixsocket-mysql` from 2.8.3 to 2.9.0
- [Release notes](https://github.com/kohlschutter/junixsocket/releases)
- [Commits](kohlschutter/junixsocket@junixsocket-2.8.3...junixsocket-2.9.0)

Updates `com.kohlschutter.junixsocket:junixsocket-native-common` from 2.8.3 to 2.9.0
- [Release notes](https://github.com/kohlschutter/junixsocket/releases)
- [Commits](kohlschutter/junixsocket@junixsocket-2.8.3...junixsocket-2.9.0)

Updates `com.kohlschutter.junixsocket:junixsocket-native-common` from 2.8.3 to 2.9.0
- [Release notes](https://github.com/kohlschutter/junixsocket/releases)
- [Commits](kohlschutter/junixsocket@junixsocket-2.8.3...junixsocket-2.9.0)

Updates `org.springframework.boot:spring-boot-maven-plugin` from 3.1.7 to 3.2.2
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.7...v3.2.2)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-parent
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: backend
- dependency-name: org.springframework.boot:spring-boot-dependencies
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: backend
- dependency-name: org.springframework.boot:spring-boot-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: backend
- dependency-name: io.asyncer:r2dbc-mysql
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: backend
- dependency-name: com.kohlschutter.junixsocket:junixsocket-mysql
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: backend
- dependency-name: com.kohlschutter.junixsocket:junixsocket-native-common
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: backend
- dependency-name: com.kohlschutter.junixsocket:junixsocket-native-common
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: backend
- dependency-name: org.springframework.boot:spring-boot-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: backend
...

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-parent</artifactId>
-    <version>3.1.7</version>
+    <version>3.2.2</version>
     <relativePath/><!-- lookup parent from repository -->
   </parent>
 
@@ -43,11 +43,11 @@
     <jacoco-maven-plugin.version>0.8.11</jacoco-maven-plugin.version>
 
     <!-- 3rd-party library versions -->
-    <spring-boot-bom.version>3.1.7</spring-boot-bom.version>
-    <junixsocket.version>2.8.3</junixsocket.version>
+    <spring-boot-bom.version>3.2.2</spring-boot-bom.version>
+    <junixsocket.version>2.9.0</junixsocket.version>
     <flyway.version>9.22.3</flyway.version>
     <artemis.version>2.31.2</artemis.version>
-    <r2dbc-mysql.version>1.0.6</r2dbc-mysql.version>
+    <r2dbc-mysql.version>1.1.1</r2dbc-mysql.version>
     <r2dbc-mariadb.version>1.1.4</r2dbc-mariadb.version>
   </properties>