Update dotnet-file.yml to latest pr action

Author: kzu

.github/workflows/dotnet-file.yml

@@ -71,7 +71,7 @@ jobs:
           validate: false
 
       - name: ✍ pull request
-        uses: peter-evans/create-pull-request@v6
+        uses: peter-evans/create-pull-request@v7
         with:
           base: main
           branch: dotnet-file-sync