CHANGES(docs): Note update_repo(set_remotes=True) behavior

Author: tony

CHANGES

@@ -13,7 +13,7 @@ $ pip install --user --upgrade --pre libvcs
 
 ### What's new
 
-- `GitRepo` now accepts remotes in `__init__`
+- {class}`libvcs.git.GitRepo` now accepts remotes in `__init__`
 
   ```python
   repo = GitRepo(
@@ -38,6 +38,8 @@ $ pip install --user --upgrade --pre libvcs
   )
   ```
 
+- {meth}`libvcs.git.GitRepo.update_repo` now accepts `set_remotes=True`
+
 ### Compatibility
 
 - Python 3.7 and 3.8 dropped (#308)