chore: pin GitHub Actions to SHA hashes

Author: mikesir87

.github/workflows/publish-labspace.yaml

@@ -13,15 +13,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Log in to DockerHub
-        uses: docker/login-action@v3
+        uses: docker/login-action@b45d80f862d83dbcd57f89517bcf500b2ab88fb2 # v4.0.0
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Publish Labspace
-        uses: dockersamples/publish-labspace-action@v2
+        uses: dockersamples/publish-labspace-action@6d55204848c70c76b7df17f8c8fb20c2b24a8b00 # v2.0.0
         with:
           target_repo: ${{ env.DOCKERHUB_REPO }}