docs(theme-classic): fixed anchor for versions configuration docs of "docsVersionDropdown" navbar item

Author: hrumhurum

website/docs/api/themes/theme-configuration.mdx

@@ -699,7 +699,7 @@ export default {
 The fields accepted by the custom version configuration:
 
 ```mdx-code-block
-<APITable name="navbar-link">
+<APITable name="navbar-docs-version-dropdown-configuration">
 ```
 
 | Name | Type | Default | Description |