feat: add options for placeholders · gravity-ui/markdown-editor@985110f

Replace `"../../utils/placeholder"` with `'../../utils/placeholder'`

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Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v2, actions/setup-node@v2. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.