Merge pull request #559 from fmcalado/fix/missing-type-on-unique-email-documentation

fix: Adds AnyPgColumn to documentation

Author: RomanNabukhotnyi

src/content/docs/guides/unique-case-insensitive-email.mdx

@@ -26,7 +26,7 @@ Drizzle has simple and flexible API, which lets you easily create such an index
   <CodeTab>
   ```ts copy {12,13}
   import { SQL, sql } from 'drizzle-orm';
-  import { pgTable, serial, text, uniqueIndex } from 'drizzle-orm/pg-core';
+  import { AnyPgColumn, pgTable, serial, text, uniqueIndex } from 'drizzle-orm/pg-core';
 
   export const users = pgTable(
     'users',