Bump com.google.protobuf:protobuf-gradle-plugin from 0.9.2 to 0.9.4

Bumps [com.google.protobuf:protobuf-gradle-plugin](https://github.com/google/protobuf-gradle-plugin) from 0.9.2 to 0.9.4.
- [Release notes](https://github.com/google/protobuf-gradle-plugin/releases)
- [Commits](google/protobuf-gradle-plugin@0.9.2...v0.9.4)

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

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

Author: dependabot[bot]

dp-inntekt-grpc/build.gradle.kts

@@ -3,7 +3,7 @@ import com.google.protobuf.gradle.* // ktlint-disable no-wildcard-imports
 val grpcVersion = "1.51.1"
 val grpcKotlinVersion = "1.3.0"
 val protbufVersion = "3.21.12"
-val protobufGradleVersion = "0.9.2"
+val protobufGradleVersion = "0.9.4"
 
 plugins {
     kotlin("jvm")