Add manual steps for release workflow

Added manual steps for blog post creation, merging release PR, and deploying SNAPSHOT to Forge.

Author: jamesfredley

.github/workflows/release.yml

@@ -637,6 +637,16 @@ jobs:
           echo "::group::Blog Post Creation - MANUAL"
           echo "Publish a blog post on https://grails.apache.org/blog/ about the new release [${VERSION}] using the repo https://github.com/apache/grails-static-website"
           echo "::endgroup::"
+      - name: "🌎 MANUAL - Merge Close Release PR"
+        run: |
+          echo "::group::Merge Close Release PR - MANUAL"
+          echo "The last step in the grails-core release workflow will create a merge branch for the original tag with version number and then open a PR to merge back into the next branch. You will need to merge this PR into the branch after correcting any merge conflict."
+          echo "::endgroup::"
+      - name: "🌎 MANUAL - deploy the new SNAPSHOT to Forge"
+        run: |
+          echo "::group::Deploy the new SNAPSHOT to Forge - MANUAL"
+          echo "After the Close Release PR is merged, deploy the new SNAPSHOT to Forge via: https://github.com/apache/grails-core/actions/workflows/forge-deploy-snapshot.yml"
+          echo "::endgroup::"
       - name: '📧 Announcement Email'
         run: |
           echo "::group::Announcement Email"