Commiting generic method with `<` does not autoclose

[dibarbet]

Committing a generic method with < does not autoclose. Note that committing with ( does auto close.

[dibarbet]

This is likely due to < not being an auto-closing pair - https://github.com/microsoft/vscode/blob/main/extensions/csharp/language-configuration.json#L23

Unfortunately it isn't necessarily a straightforward fix to add this, as < is also used in other contexts by itself (less than sign).