fix ci

Author: crossoverJie

instrumentation/grpc-1.6/library/build.gradle.kts

@@ -7,7 +7,7 @@ val grpcVersion = "1.6.0"
 
 dependencies {
   library("io.grpc:grpc-core:$grpcVersion")
-  library("com.google.protobuf:protobuf-java:3.25.3")
+  compileOnly("com.google.protobuf:protobuf-java:3.25.3")
 
   testLibrary("io.grpc:grpc-netty:$grpcVersion")
   testLibrary("io.grpc:grpc-protobuf:$grpcVersion")