chore: fix config

Signed-off-by: Todd Baert <[email protected]>

Author: toddbaert

release-please-config.json

@@ -147,7 +147,7 @@
         "providers",
         "release",
         "tools"
-      ]
+      ],
       "extra-files": [
         "pom.xml",
         "README.md"