build(deps): Bump grpc version to 1.56.1 (#1867)

Author: lqiu96

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

@@ -27,7 +27,7 @@
         consistent across modules in this repository -->
     <javax.annotation-api.version>1.3.2</javax.annotation-api.version>
     <auto-value.version>1.10.1</auto-value.version>
-    <grpc.version>1.55.3</grpc.version>
+    <grpc.version>1.56.1</grpc.version>
     <google.auth.version>1.19.0</google.auth.version>
     <google.http-client.version>1.43.3</google.http-client.version>
     <gson.version>2.10.1</gson.version>

gax-java/dependencies.properties

@@ -31,7 +31,7 @@ version.gax_httpjson=2.31.1-SNAPSHOT
 # For context: https://github.com/googleapis/sdk-platform-java/pull/1791
 version.com_google_protobuf=3.23.2
 version.google_java_format=1.15.0
-version.io_grpc=1.55.3
+version.io_grpc=1.56.1
 
 # Maven artifacts.
 # Note, the actual name of each property matters (bazel build scripts depend on it).