Update spell-check.yml, use @v4 for actions/checkout.

.github/workflows/spell-check.yml

@@ -13,7 +13,7 @@ jobs:
     name: Check for spelling errors
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      - uses: actions/checkout@v4
       - uses: codespell-project/actions-codespell@94259cd8be02ad2903ba34a22d9c13de21a74461 # v2.0
         with:
           check_filenames: true