Merge pull request #136 from proost/doc-update-release-process

doc: update release process

Author: freakyzoidberg

RELEASE.md

@@ -121,4 +121,6 @@ Once you receive at least three +1 binding votes from PMC members and no vetos:
 1. **Move to Release**: Move the files from `dist/dev/${PROJECT}/${LANGUAGE}/${VERSION}-RC${RC#rc}` to `dist/release/${PROJECT}/${LANGUAGE}/${VERSION}` via SVN.
 2. **Delete Old RCs**: Remove the candidate files from the dev directory.
 3. **Promote Tag**: Create a final version tag `v${VERSION}` from the successful `v${CANDIDATE_NAME}` and push.
-4. **Announce**: Wait 24 hours for mirrors to sync, then email announce@apache.org.
+4. **Create GitHub Release**: Create a new release on GitHub with the tag `v${VERSION}` and link to the release notes.
+5. **Announce**: Wait 24 hours for mirrors to sync, then email announce@apache.org.
+6. **Update Website**: Update the [Apache DataSketches website](https://github.com/apache/datasketches-website) to reflect the new released version for datasketches-go.