chore: release-please config reset hackathon pkg to looker versioning (#985)

and pin sdk-codegen to a minor bump (semver from conventional commits would put it at 22.0.0 but I don't think we want that)

Author: joeldodge79

release-please-config.json

@@ -11,10 +11,10 @@
     "packages/extension-sdk": { },
     "packages/extension-sdk-react": { },
     "packages/extension-utils": { "release-as": "" },
-    "packages/hackathon": { "release-as": ""},
+    "packages/hackathon": { },
     "packages/run-it": { "release-as": "" },
     "packages/sdk": { },
-    "packages/sdk-codegen": { "release-as": "" },
+    "packages/sdk-codegen": { "release-as": "21.4.0" },
     "packages/sdk-codegen-scripts": { "release-as": "" },
     "packages/sdk-codegen-utils": { "release-as": "" },
     "packages/sdk-node": { },