Update dependency org.mockito:mockito-core to v5.15.2 (#316)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

stride-application-parent/pom.xml

@@ -54,7 +54,7 @@
         <junit-vintage-engine.version>5.9.1</junit-vintage-engine.version>
 
         <junit.version>4.13.2</junit.version>
-        <mockito.version>5.14.2</mockito.version>
+        <mockito.version>5.15.2</mockito.version>
 
         <!-- Sonar -->
         <sonar.version>4.0.0.4121</sonar.version>