workflows: hash pin Actions (#203)

Signed-off-by: Patrick Linnane <patrick@linnane.io>

.github/workflows/docker.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-tags: true
           fetch-depth: 0
@@ -31,7 +31,7 @@ jobs:
         uses: Homebrew/actions/setup-homebrew@master
 
       - name: Setup Homebrew cellar cache
-        uses: actions/cache@v4
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
         with:
           path: |
             /home/linuxbrew/.linuxbrew/Cellar
@@ -52,7 +52,7 @@ jobs:
           brew bundle
 
       - name: Log into registry 
-        uses: docker/login-action@v3
+        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
         with:
           registry: ghcr.io
           username: techarohq
@@ -60,7 +60,7 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5.7.0
         with:
           images: ghcr.io/techarohq/anubis
 
@@ -74,8 +74,8 @@ jobs:
           SLOG_LEVEL: debug
       
       - name: Generate artifact attestation
-        uses: actions/attest-build-provenance@v2
+        uses: actions/attest-build-provenance@c074443f1aee8d4aeeae555aebba3282517141b2 # v2.2.3
         with:
           subject-name: ghcr.io/techarohq/anubis
           subject-digest: ${{ steps.build.outputs.digest }}
-          push-to-registry: true
+          push-to-registry: true