fix(select): stacke example typp

Author: codebender828

packages/chakra-ui-docs/pages/select.mdx

@@ -51,7 +51,7 @@ There are three sizes of select : large (48px), default (40px) and small (32px).
   <c-select placeholder="large size" size="lg" />
   <c-select placeholder="default size" size="md" />
   <c-select placeholder="small size" size="sm" />
-</c-sack>
+</c-stack>
 ```
 
 ### Changing the appearance of the Select