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] <support@github.com>

Author: dependabot[bot]

build.gradle

@@ -4,7 +4,7 @@ plugins {
     id "com.peterabeles.gversion" version "1.10.3"
     id "com.diffplug.spotless" version "8.0.+"
     id "io.freefair.lombok" version "9.1.+"
-    id "com.google.protobuf" version "0.9.5"
+    id "com.google.protobuf" version "0.9.6"
 }
 
 java {