deps: bump org.assertj:assertj-core from 3.27.2 to 3.27.3

Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.27.2 to 3.27.3.
- [Release notes](https://github.com/assertj/assertj/releases)
- [Commits](assertj/assertj@assertj-build-3.27.2...assertj-build-3.27.3)

---
updated-dependencies:
- dependency-name: org.assertj:assertj-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

java/hello-world/build.gradle

@@ -6,7 +6,7 @@ plugins {
 def timefoldVersion = "999-SNAPSHOT"
 def logbackVersion = "1.5.16"
 def junitJupiterVersion = "5.11.4"
-def assertjVersion = "3.27.2"
+def assertjVersion = "3.27.3"
 def profile = System.properties['profile'] ?: ''
 
 group = "org.acme"

java/school-timetabling/build.gradle

@@ -37,7 +37,7 @@ dependencies {
     testImplementation "io.rest-assured:rest-assured"
     testImplementation "ai.timefold.solver:timefold-solver-test"
     testImplementation "org.awaitility:awaitility"
-    testImplementation "org.assertj:assertj-core:3.27.2"
+    testImplementation "org.assertj:assertj-core:3.27.3"
 
     // UI
     implementation "io.quarkus:quarkus-webjars-locator"

java/spring-boot-integration/build.gradle

@@ -48,7 +48,7 @@ dependencies {
     testImplementation("ai.timefold.solver:timefold-solver-test")
     testImplementation("org.springframework:spring-webflux")
     testImplementation "org.awaitility:awaitility"
-    testImplementation "org.assertj:assertj-core:3.27.2"
+    testImplementation "org.assertj:assertj-core:3.27.3"
 
     // UI
     // No webjar locator; incompatible in native mode;