title: False "Map keys must be unique" error for k8s values.yaml on VS code
body: <p>I am using VS Code to develop a helm chart. I have installed the <a href="https://marketplace.visualstudio.com/items?itemName=redhat.vscode-yaml" rel="nofollow noreferrer">YAML extension</a>.</p>
  <p>It is common for charts to contain snippets like this:</p>
  <pre class="lang-yaml prettyprint-override"><code> annotations:
       kubernetes.io/ingress.class: &quot;internal-nginx&quot;
       nginx.ingress.kubernetes.io/use-regex: &quot;true&quot;
       nginx.ingress.kubernetes.io/use-regex: &quot;true&quot;
  </code></pre>
  <p>The snippet above defines two annotations that have the same key, which is totally valid in k8s world, but the editor is complaining about the duplicated keys:</p>
  <pre class="lang-json prettyprint-override"><code>[{
      &quot;resource&quot;: &quot;/home/junowong/Sentry/uet-tracker-15.0.0/configuration.yaml&quot;,
      &quot;owner&quot;: &quot;_generated_diagnostic_collection_name_#0&quot;,
      &quot;severity&quot;: 8,
      &quot;message&quot;: &quot;Map keys must be unique&quot;,
      &quot;source&quot;: &quot;YAML&quot;,
      &quot;startLineNumber&quot;: 95,
      &quot;startColumn&quot;: 15,
      &quot;endLineNumber&quot;: 95,
      &quot;endColumn&quot;: 58
  }]
  </code></pre>
  <p>How do I turn off this error message on repo/folder/file level?</p>