chore: Update dependencies.properties and cloudbuild docker files

Author: lqiu96

.cloudbuild/library_generation/library_generation.Dockerfile

@@ -38,7 +38,7 @@ FROM docker.io/library/python:3.13.2-slim@sha256:6b3223eb4d93718828223966ad31690
 
 ARG OWLBOT_CLI_COMMITTISH=3a68a9c0de318784b3aefadcc502a6521b3f1bc5
 ARG PROTOC_VERSION=25.8
-ARG GRPC_VERSION=1.71.0
+ARG GRPC_VERSION=1.76.0
 ENV HOME=/home
 ENV OS_ARCHITECTURE="linux-x86_64"
 

.cloudbuild/library_generation/library_generation_airlock.Dockerfile

@@ -39,7 +39,7 @@ FROM us-docker.pkg.dev/artifact-foundry-prod/docker-3p-trusted/python@sha256:afc
 
 ARG OWLBOT_CLI_COMMITTISH=3a68a9c0de318784b3aefadcc502a6521b3f1bc5
 ARG PROTOC_VERSION=25.8
-ARG GRPC_VERSION=1.71.0
+ARG GRPC_VERSION=1.76.0
 ENV HOME=/home
 ENV OS_ARCHITECTURE="linux-x86_64"
 

gax-java/dependencies.properties

@@ -28,7 +28,7 @@ version.gax_httpjson=2.70.4-SNAPSHOT
 
 version.com_google_protobuf=3.25.8
 version.google_java_format=1.15.0
-version.io_grpc=1.71.0
+version.io_grpc=1.76.0
 
 # Maven artifacts.
 # Note, the actual name of each property matters (bazel build scripts depend on it).