Point to ANGLE Wrangler schedule website in document

Bug: angleproject:6768
Change-Id: Ie274383238af120792d3a66a7e829b8e6d5c46af
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3317818
Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com>
Commit-Queue: Ian Elliott <ianelliott@google.com>

infra/ANGLEWrangling.md

@@ -16,6 +16,8 @@ As an ANGLE Sheriff. Your job is to:
 If you're not an ANGLE team member, you can contact us on the public ANGLE project
 [Google group](https://groups.google.com/forum/#!forum/angleproject).
 
+**Note**: Please review and if needed update the [wrangler schedule].
+
 **Note**: It's highly recommend that all wranglers install the [Chromium Flake Linker][Flaker]
 extension for inspecting bot builds. It'll save you a lot of time.
 
@@ -24,6 +26,8 @@ extension for inspecting bot builds. It'll save you a lot of time.
 
 [Flaker]: https://chrome.google.com/webstore/detail/flake-linker/boamnmbgmfnobomddmenbaicodgglkhc
 
+[wrangler schedule]: https://rotations.corp.google.com/rotation/5080504293392384
+
 ## Task 1: Monitor ANGLE CI and Try Testers
 
 Your first job is to keep the