Update checkout action to v4.2.1

Signed-off-by: Arthit Suriyawongkul <[email protected]>

Signed-off-by: Arthit Suriyawongkul <[email protected]>

Author: bact

.github/workflows/pull_request.yml

@@ -1,3 +1,5 @@
+# SPDX-FileCopyrightText: Copyright 2024 The SPDX Contributors
+
 name: SPDX validation
 on:
   - pull_request
@@ -8,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout spdx-examples
-        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332  #v4.1.7
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871  #v4.2.1
 
       - name: Look for files with the wrong location
         run: |
@@ -74,4 +76,3 @@ jobs:
               echo "Checking $f..."
               spdx3-validate -j $f
           done
-