deps: update dependency com.google.cloud:google-iam-policy to v1.6.9 (#513)

Author: renovate-bot

samples/cloud-client/snippets/pom.xml

@@ -41,7 +41,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-iam-policy</artifactId>
-      <version>1.6.8</version>
+      <version>1.6.9</version>
       <scope>compile</scope>
     </dependency>
     <dependency>