chore(deps): update dependency com.google.oauth-client:google-oauth-client-jetty to v1.30.6 (GoogleCloudPlatform#2329)

Author: averikitsch

storage/json-api/pom.xml

@@ -57,7 +57,7 @@
     <dependency>
       <groupId>com.google.oauth-client</groupId>
       <artifactId>google-oauth-client-jetty</artifactId>
-      <version>1.30.5</version>
+      <version>1.30.6</version>
     </dependency>
     <!-- Test Dependencies -->
     <dependency>