chore(setup): add yarn cache on workflow runs

.github/workflows/mobile.release.prod.yml

@@ -26,7 +26,7 @@ jobs:
           echo "${{ secrets.ANDROID_KEYSTORE }}" > keystore.keystore.asc
           gpg -d --passphrase "${{ secrets.KEYSTORE_PASSPHRASE }}" --batch keystore.keystore.asc > android/app/keystore.keystore
       - name: Install dependencies
-        run: yarn install
+        run: yarn install --immutable
       - run: yarn build:mobile
       - name: Ruby Setup for Fastlane
         uses: ruby/setup-ruby@v1
@@ -82,7 +82,7 @@ jobs:
         run:
           echo "PACKAGE_VERSION=$(grep '"version"' package.json | cut -d '"' -f 4 | cut -d "-" -f 1)" >> $GITHUB_ENV
       - name: Install dependencies
-        run: yarn install && yarn install:pods
+        run: yarn install --immutable && yarn install:pods
       - run: yarn build:mobile
       - name: Set ssh connection to Github
         uses: webfactory/ssh-agent@v0.4.1