Fix deployment deprecation warning

The riff-raff.yaml file should use `bucketSsmLookup` to instruct
riff-raff to resolve the bucket name out of SSM. This was appearing as
a warning on Aghammarad deployments, so this updates the configuration.

anghammarad/riff-raff.yaml

@@ -12,7 +12,7 @@ deployments:
     type: aws-lambda
     parameters:
       fileName: anghammarad.jar
-      bucket: deploy-tools-dist
+      bucketSsmLookup: true
       prefixStack: false
       functionNames:
       - anghammarad-