deps: Update auth to 1.12.2 (#1012)

Author: blakeli0

first-party-dependencies/pom.xml

@@ -64,7 +64,7 @@
     <google.api-common.version>2.2.2</google.api-common.version>
     <google.common-protos.version>2.10.0</google.common-protos.version>
     <google.core.version>2.8.27</google.core.version>
-    <google.auth.version>1.12.1</google.auth.version>
+    <google.auth.version>1.12.2</google.auth.version>
     <google.http-client.version>1.42.3</google.http-client.version>
     <google.oauth-client.version>1.34.1</google.oauth-client.version>
     <google.api-client.version>2.0.1</google.api-client.version>