update readme

Author: fadi-george

README.md

@@ -12,6 +12,11 @@ The code generator uses an `api.json` spec file from the [OneSignal-Website-SDK]
 
 The generator uses the URL hard-coded as a constant in the `src/support/constants.ts` file to fetch the spec. Make sure to update this URL as needed.
 
+## Making Changes
+
+If you made changes to templates, dependencies or other items that affect the downstream builds. When changes are merged to main, a pr is made to the downstreams prs.
+**PLEASE UPDATE THE COMMIT MESSAGE** to be accurate to the change. E.g. `fix: ...` or `feat: ...` depending on the type of change.
+
 ## Building For Release
 
 Can run the build script to bundle release for each package. Used in CD.