deps: update dependency com.google.auth:google-auth-library-bom to v1…

….8.1

pom.xml

@@ -155,7 +155,7 @@
     <google.api-common.version>2.2.1</google.api-common.version>
     <google.common-protos.version>2.9.1</google.common-protos.version>
     <google.iam.version>1.5.0</google.iam.version>
-    <google.auth.version>1.7.0</google.auth.version>
+    <google.auth.version>1.8.1</google.auth.version>
     <google.api.version>1.35.2</google.api.version>
     <google.http.version>1.42.1</google.http.version>
     <grpc.version>1.47.0</grpc.version>