Add missing closing quote in example

Author: kimroen

site/src/partials/group-config/_packages.mdx

@@ -18,7 +18,7 @@ packages: ["@my-repo/**"]
 packages: ["my-server", "my-client"]
 
 // ✅ match all packages except negated ones
-packages: ["!my-server", "!@my-repo/**]
+packages: ["!my-server", "!@my-repo/**"]
 
 // ❌ no mixing of specific and negated packages
 packages: ["my-client", "!@my-repo/**"]