workflows: update create-pull-request to v6

No breaking changes that affect us.

Signed-off-by: Benjamin Gilbert <bgilbert@cs.cmu.edu>

Author: bgilbert

.github/workflows/update-check.yml

@@ -45,7 +45,7 @@ jobs:
           modified=$(echo $modified | sed -e 's/ /, /g')
           echo "modified=$modified" >> $GITHUB_OUTPUT
       - name: Post updated wraps
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v6
         with:
           token: ${{ secrets.OPENSLIDE_BOT_TOKEN }}
           author: "${{ env.GIT_NAME }} <${{ env.GIT_EMAIL }}>"