Update towncrier

Following matrix-appservice-irc here

Signed-off-by: Tadeusz „tadzik” Sośnierz <tadeusz@sosnierz.com>

Author: tadzik

.github/workflows/changelog.yml

@@ -14,7 +14,7 @@ jobs:
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
       - uses: actions/setup-python@v3
-      - run: pip install towncrier==19.2.0
+      - run: pip install towncrier>=22
       - run: scripts/changelog-check.sh
         env:
-          PULL_REQUEST_NUMBER: ${{ github.event.number }}
+          PULL_REQUEST_NUMBER: ${{ github.event.number }}