fix: Error for Used undeclared dependencies found by declaring google-auth-library-credentials dependencies

Author: jinseopkim0

google-cloud-logging/pom.xml

@@ -102,6 +102,10 @@
       <groupId>com.google.errorprone</groupId>
       <artifactId>error_prone_annotations</artifactId>
     </dependency>
+    <dependency>
+      <groupId>com.google.auth</groupId>
+      <artifactId>google-auth-library-credentials</artifactId>
+    </dependency>
 
     <!-- Test dependencies -->
     <dependency>