GH-2493: Sync Gradle .module File to Maven (#2494)

Resolves https://github.com/spring-projects/spring-amqp/issues/2493

.github/release-files-spec.json

@@ -16,6 +16,9 @@
                 },
                 {
                   "name": {"$match": "*.jar"}
+                },
+                {
+                  "name": {"$match": "*.module"}
                 }
               ]
             }