Update Yarn install commands to use --immutable flag for consistency

Author: lposen

.github/actions/setup/action.yml

@@ -23,5 +23,5 @@ runs:
 
     - name: Install dependencies
       if: steps.yarn-cache.outputs.cache-hit != 'true'
-      run: yarn install --immutable --frozen-lockfile
+      run: yarn install --immutable
       shell: bash

.github/workflows/new.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Example App Yarn install
         run: |
           cd example
-          yarn install
+          yarn install --immutable
           cd ..
 
       - name: Cache Detox build