ignore go.sum in codespell workflow

Author: markusressel

.github/workflows/codespell.yml

@@ -24,4 +24,5 @@ jobs:
       - name: Codespell
         uses: codespell-project/actions-codespell@v2
         with:
-          ignore_words_file: .codespellignore
+          ignore_words_file: .codespellignore
+          skip: "go.sum"