revert: remove copyright-check.yml changes from trufflehog PR

copyright-check.yml action pinning belongs in PR #43 only.
Keep each PR to a single workflow file.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: SameeraPriyathamTadikonda

.github/workflows/copyright-check.yml

@@ -14,14 +14,14 @@ jobs:
 
     steps:
     - name: Checkout PR head
-      uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      uses: actions/checkout@v4
       with:
         ref: ${{ github.event.pull_request.head.sha }}
         path: target-repo
         persist-credentials: false
 
     - name: Checkout pr-workflows repo
-      uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      uses: actions/checkout@v4
       with:
         repository: ${{ github.repository_owner }}/pr-workflows
         ref: main
@@ -47,7 +47,7 @@ jobs:
         echo "config-file=$cfg" >> $GITHUB_OUTPUT
 
     - name: Set up Python
-      uses: actions/setup-python@7f4fc3e22c37d6ff65e88745f38bd3157c663f7c # v4
+      uses: actions/setup-python@v4
       with:
         python-version: '3.11'