gh-40843: Restore release notes creation step
    
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fixes the issue discussed in https://groups.google.com/g/sage-
devel/c/LFfhN0CpGJ8.

However, we retain the idea of #40709 that a github release is made only
in one step in the workflow. Previously, before #40709, a github release
was made in two steps "Create release" and "Create release assets". This
strategy worked well but started failing some months ago.

Test (with #40840):
https://github.com/kwankyu/sage/actions/runs/17846547780.

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- [ ] I have updated the documentation and checked the documentation
preview.

### ⌛ Dependencies

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URL: #40843
Reported by: Kwankyu Lee
Reviewer(s):

Author: Release Manager

.github/workflows/dist.yml

@@ -133,14 +133,32 @@ jobs:
           name: dist
           path: dist
 
-      - name: Create release assets
+      - name: Create release notes
+        env:
+          GITHUB_PAT: ${{ secrets.RELEASE_CREATION_TOKEN }}
+        run: |
+          latest_release_tag=$(curl -s https://api.github.com/repos/${{ github.repository }}/releases \
+          | jq -r 'sort_by(.created_at) | last(.[]).tag_name')
+          release_notes=$(curl -s \
+            -X POST \
+            -H "Accept: application/vnd.github+json" \
+            -H "Authorization: Bearer $GITHUB_PAT" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/${{ github.repository }}/releases/generate-notes \
+            -d "{
+              \"tag_name\": \"${{ github.ref_name }}\",
+              \"previous_tag_name\": \"$latest_release_tag\"
+            }" | jq -r '.body')
+          echo "$release_notes" > release_notes
+
+      - name: Create release
         uses: softprops/action-gh-release@v2
         with:
           files: |
             dist/*
             upstream/*
           token: ${{ secrets.RELEASE_CREATION_TOKEN }}
-          generate_release_notes: true
+          body_path: release_notes
           prerelease: ${{ contains(github.ref_name, 'beta') || contains(github.ref_name, 'rc') }}
 
   build_wheels: