deps: bump io.quarkus:quarkus-bom from 3.15.1 to 3.16.1

Bumps [io.quarkus:quarkus-bom](https://github.com/quarkusio/quarkus) from 3.15.1 to 3.16.1.
- [Release notes](https://github.com/quarkusio/quarkus/releases)
- [Commits](quarkusio/quarkus@3.15.1...3.16.1)

---
updated-dependencies:
- dependency-name: io.quarkus:quarkus-bom
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

java/school-timetabling/build.gradle

@@ -3,7 +3,7 @@ plugins {
     id "io.quarkus" version "3.15.1"
 }
 
-def quarkusVersion = "3.15.1"
+def quarkusVersion = "3.16.1"
 def timefoldVersion = "999-SNAPSHOT"
 def profile = System.properties['profile'] ?: ''
 def enterprise = System.properties['enterprise'] ?: ''