fix(deps): update dependency astro to v6

Author: renovate[bot]

packages/documentation/package.json

@@ -15,7 +15,7 @@
 		"@astrojs/starlight": "0.36.2",
 		"@sapphire/docusaurus-plugin-npm2yarn2pnpm": "2.0.2",
 		"@webcomponents/template-shadowroot": "^0.2.1",
-		"astro": "5.18.1",
+		"astro": "6.1.6",
 		"lit": "^3.3.1",
 		"react": "^19.2.0",
 		"starlight-typedoc": "0.21.3",