chore: reset release-please config (#987)

setting next sdk-rtl version to 21.3.3 because package.json and all the
dependencies currently point to 21.3.2 but release-please missed it so
next time it runs it thinks it will be starting at 21.3.1 which is what
is recorded in the last release at f886733

release-please-config.json

@@ -2,7 +2,6 @@
   "plugins": ["node-workspace"],
   "bump-minor-pre-major": true,
   "bump-patch-for-minor-pre-major": true,
-  "release-as": "22.0.0",
   "packages": {
     ".": { "release-as": "" },
     "packages/api-explorer": { "release-as": "" },
@@ -14,11 +13,11 @@
     "packages/hackathon": { },
     "packages/run-it": { "release-as": "" },
     "packages/sdk": { },
-    "packages/sdk-codegen": { "release-as": "21.4.0" },
+    "packages/sdk-codegen": { "release-as": "" },
     "packages/sdk-codegen-scripts": { "release-as": "" },
     "packages/sdk-codegen-utils": { "release-as": "" },
     "packages/sdk-node": { },
-    "packages/sdk-rtl": { "release-as": "" },
+    "packages/sdk-rtl": { "release-as": "21.3.3" },
     "packages/wholly-sheet": { "release-as": "" },
     "python": { "release-type": "python", "package-name": "looker_sdk" }
   }