Add T-lang-ops and WG-async to calendar repo (#1180)

T-lang uses the calendar managed by the `calendar` repository, and the
lang team itself already has the correct permissions here.  However,
the T-lang-ops team mostly handles the scheduling for the T-lang
meetings, so T-lang-ops needs perms on this repos also.  Let's add
those.

Separately, WG-async uses the calendar managed by the `calendar`
repository and so should also have permissions.

repos/rust-lang/calendar.toml

@@ -10,9 +10,11 @@ crates-io = "maintain"
 docs-rs = "maintain"
 infra = "maintain"
 lang = "maintain"
+lang-ops = "maintain"
 leadership-council = "maintain"
 libs = "maintain"
 release = "maintain"
+wg-async = "maintain"
 
 [[branch-protections]]
 pattern = "main"