improve dedup doc : default params

**Is your feature request related to a problem? Please describe.**
Improve the documentation of dedup function to specify the property dedup by default :

```
PropertyType.ACCESSOR,
PropertyType.MESH,
PropertyType.TEXTURE,
PropertyType.MATERIAL,
PropertyType.SKIN,
```

**Describe alternatives you've considered**
Alternative : also add it to DedupOptions

**Additional context**
While reading the documentation page of dedup, I wasnt sure and went to the source code to double check, I think it can be easily avoid for futur users.

Start at the dedup documentation page and compare its documented defaults with the source implementation. Review the DedupOptions reference mentioned in the issue before deciding where the information belongs. The work is done when the documentation clearly lists the default properties dedup processes.

Written by the indexing model from the issue text.