deps: Bump grpc-java to v1.76.0

Author: lqiu96

gapic-generator-java-pom-parent/pom.xml

@@ -27,7 +27,7 @@
     <!-- External dependencies, especially gRPC and Protobuf version, should be
         consistent across modules in this repository -->
     <javax.annotation-api.version>1.3.2</javax.annotation-api.version>
-    <grpc.version>1.71.0</grpc.version>
+    <grpc.version>1.76.0</grpc.version>
     <google.auth.version>1.39.1</google.auth.version>
     <google.http-client.version>1.47.1</google.http-client.version>
     <gson.version>2.12.1</gson.version>