docs: fix severity for no-unsafe-iframe-sandbox in rule docs (#1327)

Author: JstnMcBrd

apps/website/content/docs/rules/overview.mdx

@@ -107,7 +107,7 @@ full: true
 | [`no-script-url`](./dom-no-script-url)                                                           | 1️⃣ 1️⃣ |           | Disallow `javascript:` URLs as attribute values                                      |             |
 | [`no-string-style-prop`](./dom-no-string-style-prop)                                             | 2️⃣ 2️⃣ |           | Disallow string values for the `style` prop                                          |             |
 | [`no-unknown-property`](./dom-no-unknown-property)                                               | 0️⃣ 0️⃣ | `🔧` `⚙️` | Disallow unknown `DOM` property                                                      |             |
-| [`no-unsafe-iframe-sandbox`](./dom-no-unsafe-iframe-sandbox)                                     | 0️⃣ 0️⃣ |           | Enforces `sandbox` attribute for `iframe` elements is not set to unsafe combinations |             |
+| [`no-unsafe-iframe-sandbox`](./dom-no-unsafe-iframe-sandbox)                                     | 1️⃣ 1️⃣ |           | Enforces `sandbox` attribute for `iframe` elements is not set to unsafe combinations |             |
 | [`no-unsafe-target-blank`](./dom-no-unsafe-target-blank)                                         | 0️⃣ 1️⃣ |    `🔧`   | Disallow `target="_blank"` without `rel="noreferrer noopener"`                       |             |
 | [`no-use-form-state`](./dom-no-use-form-state)                                                   | 2️⃣ 2️⃣ |    `🔄`   | Replaces usages of `useFormState` with `useActionState`                              |   >=19.0.0  |
 | [`no-void-elements-with-children`](./dom-no-void-elements-with-children)                         | 2️⃣ 2️⃣ |           | Disallow `children` in void DOM elements                                             |             |