Try this solution for yarn2/corepack

actions/setup-node#480 (comment)

.github/actions/build/action.yml

@@ -2,21 +2,17 @@ name: Build Website
 runs:
   using: "composite"
   steps:
+    - name: Enable Corepack
+      shell: bash
+      run: corepack enable
     - name: Set Node.js
       uses: actions/setup-node@v4
       with:
         node-version: 20.x
         cache: 'yarn'
-    - name: Set up Yarn2
+    - name: Install dependencies
       shell: bash
-      run: |
-        corepack enable
-        yarn set version berry
-    - name: Run install
-      uses: borales/actions-yarn@v5
-      with:
-        cmd: install # will run `yarn install` command
-    - name: Build production bundle
-      uses: borales/actions-yarn@v5
-      with:
-        cmd: build
+      run: yarn install --immutable
+    - name: Run build
+      shell: bash
+      run: yarn build