[llvm] [docs] Add beginner-focused office hours (PR #80308)

[Aaron Ballman via llvm-commits]

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@@ -331,6 +331,11 @@ don't find anyone present, chances are they happen to be off that day.
     - Monthly, 4th Wednesday of the month at 9:30am PT, for 30 minutes.
     - `Google meet <https://meet.google.com/pdd-dibg-cwv>`__
     - English
+  * - Rotating hosts
+    - Getting Started, beginner questions, new contributors.
+    - Every Tuesday at 2 PM ET (11 AM PT), for 30 minutes.
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AaronBallman wrote:

Suggestion for a follow-up (not insisting on it, either!), convert all of the entries to specify their time in UTC but use a link to something like https://www.timeanddate.com/worldclock/converter.html?iso=20240201T180000&p1=136&p2=179&p3=224&p4=248 so that people have a better idea of when that is. It's not perfect thanks to stuff like daylight savings time changing throughout the year, but maybe there's a feature on that site (or one of the other ones) to account for that.

https://github.com/llvm/llvm-project/pull/80308