Invalid link with seealso tag

**Describe the bug**

The generated link for `seealso` tag are invalid when cref attribute points to a type in the same assembly:

I have the following doc comment:

```
/// A nice operation similar to .
///
```

Building with docfx produces the following warning:

```
docfx_project\api\MyApp.MyClass.yml: warning InvalidBookmark: Invalid link:
'MyOtherOperation'. The file api/MyApp.MyOtherClass.yml doesn't contain a bookmark named 'MyApp.MyOtherClass.MyOtherOperation(System.String,System.Int32)'.
```

For the `see` tag the generated link is correct:

```
/api/MyApp.MyOtherClass.html#MyApp_MyOtherClass_MyOtherOperation_System_String_System_Int32_
```

For the `seealso` tag it is not correct

```
/api/MyApp.MyOtherClass.html#MyApp.MyOtherClass.MyOtherOperation(System.String,System.Int32)
```