chore(bump-packages): add back missing env var; update PR description (#6856)

Author: gribnoysup

.github/workflows/bump-packages.yaml

@@ -29,7 +29,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: 20.16.0
-          cache: "npm"
+          cache: 'npm'
 
       - name: Install [email protected]
         run: |
@@ -42,17 +42,26 @@ jobs:
 
       - name: Bump packages
         env:
-          SKIP_BUMP_PACKAGES: "mongodb-compass"
+          SKIP_BUMP_PACKAGES: 'mongodb-compass'
+          # Do not remove this variable, bump-packages script uses this env var
+          # to find the previous commit
+          LAST_BUMP_COMMIT_MESSAGE: 'chore(release): bump package versions'
         run: npm run bump-packages
 
       - name: Create Pull Request
         uses: peter-evans/create-pull-request@5e914681df9dc83aa4e4905692ca88beb2f9e91f # 7.0.5
         with:
           token: ${{ steps.app-token.outputs.token }}
-          commit-message: "chore(release): bump package versions"
+          commit-message: 'chore(release): bump package versions'
           branch: ci/bump-packages
-          title: "chore(release): bump package versions"
+          title: 'chore(release): bump package versions'
           labels: no-title-validation
-          author: "${{ steps.app-token.outputs.app-slug}}[bot] <${{ steps.app-token.outputs.app-email }}>"
-          body: |
-            - Bump package versions
+          author: '${{ steps.app-token.outputs.app-slug}}[bot] <${{ steps.app-token.outputs.app-email }}>'
+          body: |-
+            This PR is autogenerated and updates the version of every package in
+            the monorepo that was changed since last publish. If you need to
+            publish packages to update the version elsewhere, **you can do this
+            at your own convenience by just merging this PR**.
+
+            After PR is merged, it starts an automatic publish process via
+            GitHub Actions, you can follow the process [on this page](https://github.com/mongodb-js/compass/actions/workflows/publish-packages.yaml).