chore(deps): bump grpc-stub from 1.45.1 to 1.50.2

Bumps [grpc-stub](https://github.com/grpc/grpc-java) from 1.45.1 to 1.50.2.
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.45.1...v1.50.2)

---
updated-dependencies:
- dependency-name: io.grpc:grpc-stub
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

build.gradle

@@ -33,7 +33,7 @@ dependencies {
     runtimeOnly 'io.netty:netty-tcnative-boringssl-static:2.0.20.Final'
     implementation 'io.grpc:grpc-netty-shaded:1.45.1'
     implementation 'io.grpc:grpc-protobuf:1.45.1'
-    implementation 'io.grpc:grpc-stub:1.45.1'
+    implementation 'io.grpc:grpc-stub:1.51.0'
     implementation 'org.apache.commons:commons-lang3:3.9'
     implementation 'org.apache.httpcomponents:httpcore:4.4.15'
     compileOnly 'io.micronaut:micronaut-http:3.7.2'