build(deps): bump com.google.protobuf from 0.9.5 to 0.9.6

Bumps com.google.protobuf from 0.9.5 to 0.9.6.

---
updated-dependencies:
- dependency-name: com.google.protobuf
  dependency-version: 0.9.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -15,7 +15,7 @@ jspecify = "1.0.0"
 junit = "6.0.1"
 nmcp = "1.3.0"
 picocli = "4.7.7"
-protobuf-plugin = "0.9.5"
+protobuf-plugin = "0.9.6"
 protobuf = "3.25.8"
 scala-library = "2.12.21"
 scalatest = "3.2.19"