Update skip list in codespell GitHub Action

Author: bells17

.github/workflows/codespell.yml

@@ -12,4 +12,4 @@ jobs:
       - uses: codespell-project/actions-codespell@master
         with:
           check_filenames: true
-          skip: ./.git,./.github/workflows/codespell.yml,.git,*.png,*.jpg,*.svg,*.sum,./vendor,go.sum,./release-tools/prow.sh,./client/vendor
+          skip: "*.png,*.jpg,*.svg,*.sum,./.git,./.github/workflows/codespell.yml,./prow.sh"