ci: use latest peter-evans/create-pull-request job

Author: dasvh

.github/workflows/docs.yml

@@ -22,7 +22,7 @@ jobs:
           demojify: true
           treesitter: true
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v8
         with:
           base: "main"
           branch: docs/update-docs