fix: Add missing checkout action

Also update the checkout action version

Author: PerfectSlayer

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # 3.3.0
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # 4.1.1
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@f03ac48505955848960e80bbb68046aa35c7b9e7 # 2.4.1
@@ -65,6 +65,9 @@ jobs:
       actions: write
     runs-on: ubuntu-latest
     steps:
-      - uses: gautamkrishnar/keepalive-workflow@v1
+      - name: Checkout repository
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # 4.1.1
+      - name: Keep workflow alive
+        uses: gautamkrishnar/keepalive-workflow@306efe4fc63923e36571682b4f4b3e3eee8b6625 # v1.2.6
         with:
           use_api: true