deps: update core dependencies

Author: renovate-bot

pom.xml

@@ -60,10 +60,10 @@
  </licenses>
  <properties>
  <site.installationModule>grafeas</site.installationModule>
- <grpc.version>1.27.2</grpc.version>
+ <grpc.version>1.28.1</grpc.version>
  <api-client.version>1.30.9</api-client.version>
- <google.core.version>1.93.1</google.core.version>
- <gax.version>1.54.0</gax.version>
+ <google.core.version>1.93.3</google.core.version>
+ <gax.version>1.55.0</gax.version>
  <http-client-bom.version>1.34.2</http-client-bom.version>
  <guava.version>28.2-android</guava.version>
  <junit.version>4.12</junit.version>