ci: replace tag with commit sha due to security concerns (#283)

* ci: replace tag with commit sha due to security concerns

* chore: fix formatting issue

.github/workflows/main.yaml

@@ -18,18 +18,18 @@ jobs:
     runs-on: "ubuntu-latest"
     steps:
       - name: 📚 Git Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
 
       - name: 🐦 Setup Flutter
-        uses: subosito/flutter-action@v2
+        uses: subosito/flutter-action@48cafc24713cca54bbe03cdc3a423187d413aafa
         with:
           flutter-version: "3.10.2"
           channel: stable
           cache: true
           cache-key: flutter-:os:-:channel:-:version:-:arch:-:hash:-${{ hashFiles('**/pubspec.lock') }}
 
       - name: 🤫 Set SSH Key
-        uses: webfactory/ssh-agent@v0.8.0
+        uses: webfactory/ssh-agent@fd34b8dee206fe74b288a5e61bc95fba2f1911eb
         with:
           ssh-private-key: ${{secrets.SSH_PRIVATE_KEY}}