chore(deps): pin dependencies (#819)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
diff --git a/.github/workflows/ceph.yml b/.github/workflows/ceph.yml
index 48210dd..57da248 100644
--- a/.github/workflows/ceph.yml
+++ b/.github/workflows/ceph.yml
@@ -47,7 +47,7 @@
       cancel-in-progress: true
     steps:
       - name: Checkout project
-        uses: actions/checkout@v4
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
 
       - name: Install Poetry
         run: pipx install poetry
@@ -76,7 +76,7 @@
       # Enable tmate debugging of manually-triggered workflows if the input option was provided
       - name: Setup tmate session
         if: ${{ failure() }}
-        uses: mxschmitt/action-tmate@v3
+        uses: mxschmitt/action-tmate@a283f9441d2d96eb62436dc46d7014f5d357ac22 # v3
         timeout-minutes: 60
 
       - name: Run Molecule Destroy
@@ -96,7 +96,7 @@
       cancel-in-progress: true
     steps:
       - name: Checkout project
-        uses: actions/checkout@v4
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
 
       - name: Install Poetry
         run: pipx install poetry