chore(deps): Bump io.grpc:protoc-gen-grpc-java from 1.70.0 to 1.71.0 in /pbj-core/hiero-dependency-versions (#411)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pbj-core/hiero-dependency-versions/build.gradle.kts

@@ -51,7 +51,7 @@ dependencies.constraints {
     // Code generation
     api("org.antlr:antlr4:$antlr")
     api("com.google.protobuf:protoc:$protobuf")
-    api("io.grpc:protoc-gen-grpc-java:1.70.0")
+    api("io.grpc:protoc-gen-grpc-java:1.71.0")
 
     // Testing only
     api("com.google.guava:guava:33.4.0-jre") { because("com.google.common") }