fix: update grpc to 1.55.1 in dependencies.properties (#1794)

Author: burkedavison

gax-java/dependencies.properties

@@ -27,7 +27,7 @@ version.gax_httpjson=2.29.1-SNAPSHOT
 # not for self-service clients (from googleapis project).
 version.com_google_protobuf=3.23.2
 version.google_java_format=1.15.0
-version.io_grpc=1.54.0
+version.io_grpc=1.55.1
 
 # Maven artifacts.
 # Note, the actual name of each property matters (bazel build scripts depend on it).