fix PATH for GitHub Ci

.github/workflows/ci.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Install Nushell
         run: |
           make install-nu
-          export PATH="$(make print-NU_DEST):$PATH"
+          echo "PATH=\"$(make print-NU_DEST):$PATH\"" >> $GITHUB_ENV
       - name: Show configuration
         run: make show
       - name: Run tests