build(deps): update dependency com.google.cloud:google-cloud-shared-config to v1.5.4 (#742)

Author: renovate-bot

java-notification/pom.xml

@@ -14,7 +14,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-shared-config</artifactId>
-    <version>1.5.3</version>
+    <version>1.5.4</version>
   </parent>
   <developers>
     <developer>