ci: explicitly enable corepack in GHA

See: actions/setup-node#531

Author: xen0n

.github/workflows/deploy.yml

@@ -12,6 +12,8 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: true
+      - name: Enable Corepack
+        run: corepack enable
       - uses: actions/setup-node@v4
         with:
           node-version: 20