Bump the backend group across 1 directory with 4 updates

Bumps the backend group with 3 updates in the / directory: [org.springframework.boot:spring-boot-starter-parent](https://github.com/spring-projects/spring-boot), [org.springframework.boot:spring-boot-dependencies](https://github.com/spring-projects/spring-boot) and [org.springframework.boot:spring-boot-maven-plugin](https://github.com/spring-projects/spring-boot).


Updates `org.springframework.boot:spring-boot-starter-parent` from 3.3.6 to 3.4.0
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.6...v3.4.0)

Updates `org.springframework.boot:spring-boot-dependencies` from 3.3.6 to 3.4.0
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.6...v3.4.0)

Updates `org.springframework.boot:spring-boot-maven-plugin` from 3.3.6 to 3.4.0
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.6...v3.4.0)

Updates `org.apache.activemq:artemis-server` from 2.33.0 to 2.37.0

Updates `org.springframework.boot:spring-boot-maven-plugin` from 3.3.6 to 3.4.0
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.6...v3.4.0)

---
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: org.apache.activemq:artemis-server
  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>3.3.6</version>
+    <version>3.4.0</version>
     <relativePath/><!-- lookup parent from repository -->
   </parent>
 
@@ -44,7 +44,7 @@
     <maven-jacoco-plugin.version>0.8.12</maven-jacoco-plugin.version>
 
     <!-- 3rd-party library versions -->
-    <spring-boot-bom.version>3.3.6</spring-boot-bom.version>
+    <spring-boot-bom.version>3.4.0</spring-boot-bom.version>
     <spring-modulith-bom.version>1.3.0</spring-modulith-bom.version>
     <junixsocket.version>2.10.1</junixsocket.version>
     <flyway.version>11.1.0</flyway.version>