Fix changelog entry for Gunicorn 23.0.0

The changelog entry for the update to Gunicorn 23.0.0 mentions a
security vulnerability that was fixed, but this vulnerability was
actually fixed in Gunicorn 22.0.0 and described in the changelog
for inboard 0.68.0. This commit will add some logic to the changelog
generation job in GitHub Actions to remove the duplicate info.

.github/workflows/ci.yml

@@ -440,6 +440,21 @@ jobs:
           ESCAPE_DUNDERS='s:([^`])(__)([a-z]+)(__)([^`]):\1\\_\\_\3\\_\\_\5:g'
           sed -Ei "$ESCAPE_DUNDERS" CHANGELOG.md
           sed -Ei "$ESCAPE_DUNDERS" docs/changelog.md
+          REPLACEMENT='There are several breaking changes noted in the\n[Gunicorn changelog](https://docs.gunicorn.org/en/latest/news.html).'
+          sed -Ei \
+            -e "s|\[Changes\]\(https://docs.gunicorn.org/en/latest/news.html\) include|$REPLACEMENT|g" \
+            -e "s|There are several breaking changes noted in the Gunicorn.*||g" \
+            -e "s|a fix for a high-severity security vulnerability \(CVE-2024-1135,||g" \
+            -e "s|\[GHSA-w3h3-4rj7-4ph4\]\(https://github.com/advisories/GHSA-w3h3-4rj7-4ph4\)\).||g" \
+            CHANGELOG.md
+          sed -Ei -z "s|\n\n\n||g" CHANGELOG.md
+          sed -Ei \
+            -e "s|\[Changes\]\(https://docs.gunicorn.org/en/latest/news.html\) include|$REPLACEMENT|g" \
+            -e "s|a fix for a high-severity security vulnerability \(CVE-2024-1135,||g" \
+            -e "s|\[GHSA-w3h3-4rj7-4ph4\]\(https://github.com/advisories/GHSA-w3h3-4rj7-4ph4\)\).||g" \
+            -e "s|There are several breaking changes noted in the Gunicorn changelog.||g" \
+            docs/changelog.md
+          sed -Ei -z "s|\n\n\n||g" docs/changelog.md
       - name: Format changelog with Prettier
         run: npx -s -y prettier@'^3.4' --write CHANGELOG.md docs/changelog.md
       - name: Create pull request with updated changelog