deps: update dependency com.google.cloud:google-cloud-core-grpc to v1.91.2 (#5)

Author: renovate-bot

pom.xml

@@ -62,7 +62,7 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-recommender-parent</site.installationModule>
-    <google.core.version>1.90.0</google.core.version>
+    <google.core.version>1.91.2</google.core.version>
     <google.api-common.version>1.8.1</google.api-common.version>
     <google.common-protos.version>1.16.0</google.common-protos.version>
     <gax.version>1.48.1</gax.version>