samples: update dependency com.google.cloud.samples:shared-configuration to v1.0.12 (#114)

Author: renovate-bot

samples/pom.xml

@@ -18,7 +18,7 @@
   <parent>
     <groupId>com.google.cloud.samples</groupId>
     <artifactId>shared-configuration</artifactId>
-    <version>1.0.11</version>
+    <version>1.0.12</version>
   </parent>
 
   <properties>