ci: Bump actions/setup-node from 5 to 6 in /.github/actions/setup (#394)

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Author: dependabot[bot]

.github/actions/setup/action.yaml

@@ -12,7 +12,7 @@ runs:
       uses: pnpm/action-setup@v4.1.0
 
     - name: Use Node.js ${{ inputs.node-version }}
-      uses: actions/setup-node@v5
+      uses: actions/setup-node@v6
       with:
         registry-url: 'https://registry.npmjs.org'
         node-version: ${{ inputs.node-version }}