Try to generate release notes for this specific branch.

Also try to cross-reference release page and build page.

(cherry picked from commit a908b4cf)

.github/workflows/build.yaml

@@ -367,25 +367,30 @@ jobs:
           mv newview/viewer_version.txt macOS-viewer_version.txt
 
       # forked from softprops/action-gh-release
-      - uses: secondlife-3p/action-gh-release@v1
+      - name: Create GitHub release
+        id: release
+        uses: secondlife-3p/action-gh-release@v1
         with:
-          # name the release page for the build number so we can find it
-          # easily (analogous to looking up a codeticket build page)
-          name: "v${{ github.run_id }}"
+          # name the release page for the branch
+          name: "${{ needs.build.outputs.viewer_branch }}"
           # SL-20546: want the channel and version to be visible on the
           # release page
           body: |
+            Build ${{ github.repositoryUrl }}/actions/runs/${{ github.run_id }}
             ${{ needs.build.outputs.viewer_channel }}
             ${{ needs.build.outputs.viewer_version }}
-            ${{ needs.build.outputs.viewer_branch }}
             ${{ needs.build.outputs.relnotes }}
           prerelease: true
           generate_release_notes: true
+          target_commitish: ${{ github.ref }}
           append_body: true
-          # the only reason we generate a GH release is to post build products
           fail_on_unmatched_files: true
           files: |
             *.dmg 
             *.exe
             *-autobuild-package.xml
             *-viewer_version.txt
+
+      - name: post release URL
+        run: |
+          echo "::notice::Release ${{ steps.release.outputs.url }}"