Fix release notes: extract from CHANGELOG.md directly (drop ffurrer2 action)

.github/workflows/build.yml

@@ -63,7 +63,12 @@ jobs:
 
       - name: Extract release notes
         id: changelog
-        uses: ffurrer2/extract-release-notes@v2
+        shell: bash
+        run: |
+          EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
+          echo "release_notes<<$EOF" >> "$GITHUB_OUTPUT"
+          awk '/^## /{if(found)exit; found=1; next} found{print}' CHANGELOG.md >> "$GITHUB_OUTPUT"
+          echo "$EOF" >> "$GITHUB_OUTPUT"
 
       - name: Add new contributors to release notes
         if: startsWith(github.ref, 'refs/tags/v')