[11.x] migration docs: adding clarification for json/jsonb datatypes… (laravel#10134)

* [11.x] migration docs:  adding clarification for json/jsonb datatypes on sqlite

Adding clarification for json/jsonb datatypes on sqlite.

* Update migrations.md

---------

Co-authored-by: Taylor Otwell <[email protected]>

Author: hexathos

migrations.md

@@ -638,13 +638,17 @@ The `json` method creates a `JSON` equivalent column:
 
     $table->json('options');
 
+When using SQLite, a `TEXT` column will be created.
+
 <a name="column-method-jsonb"></a>
 #### `jsonb()` {.collection-method}
 
 The `jsonb` method creates a `JSONB` equivalent column:
 
     $table->jsonb('options');
 
+When using SQLite, a `TEXT` column will be created.
+
 <a name="column-method-longText"></a>
 #### `longText()` {.collection-method}