Update create-pull-request action to version 8

Author: kzu

.github/workflows/includes.yml

@@ -50,7 +50,7 @@ jobs:
           ((get-content -raw $file) -replace '\$product\$',$product).trim() | set-content $file
 
       - name: ✍ pull request
-        uses: peter-evans/create-pull-request@v6
+        uses: peter-evans/create-pull-request@v8
         with:
           add-paths: |
             **.md