Bump kafkaVersion from 7.5.3-ce to 7.6.1-ce

Bumps `kafkaVersion` from 7.5.3-ce to 7.6.1-ce.

Updates `org.apache.kafka:kafka-streams` from 7.5.3-ce to 7.6.1-ce

Updates `org.apache.kafka:kafka-clients` from 7.5.3-ce to 7.6.1-ce

---
updated-dependencies:
- dependency-name: org.apache.kafka:kafka-streams
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.apache.kafka:kafka-clients
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

build.gradle.kts

@@ -86,7 +86,7 @@ subprojects {
     extra.apply {
         set("specmeshVersion", "0.9.2")
         set("specmeshDataGenVersion", "0.5.3")
-        set("kafkaVersion", "7.5.3-ce")
+        set("kafkaVersion", "7.6.1-ce")
         set("confluentVersion", "7.5.3")
         set("testcontainersVersion", "1.18.3")
         set("openTracingVersion", "0.33.0")