fix: composite action

Author: itsyoboieltr

.github/actions/setup-environment/action.yml

@@ -0,0 +1,20 @@
+name: 'Setup environment'
+description: 'Setup environment'
+runs:
+  using: 'composite'
+  steps:
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: 'lts/*'
+
+    - run: corepack enable
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version-file: '.nvmrc'
+        cache: yarn
+
+    - name: Install dependencies
+      run: yarn --immutable

.github/workflows/run-unit-tests.yml

@@ -12,7 +12,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup environment
-        uses: MetaMask/metamask-extension/.github/workflows/setup-environment.yml@move-unit-tests-to-github-actions
+        uses: ./.github/actions/setup-environment
 
       - name: test:coverage:jest:dev
         run: yarn test:coverage:jest:dev