Add guidance for what to put in community calendar invites

[tonic]

How about including an example?

Example calendar invite:

This event is a meetup for all developers of LLDB. Meeting agendas are posted on discourse before the event.

Attendees are required to adhere to the LLVM Code of Conduct (https://llvm.org/docs/CodeOfConduct.html). For any Code of Conduct reports, please contact the organizers, and also email [e-mail].

Agenda/Meeting Minutes: Link to minutes
Organizer(s): First Surname ([e-mail])

llvm/docs/GettingInvolved.rst

437

I would change to just "Please put"

439

Include things such as who the event is for and what sort of topics are discussed.

[lattner]

LGTM with tanya's suggestions!

llvm/docs/GettingInvolved.rst

 A number of regular calls are organized on specific topics. It should be
 expected that the range of topics will change over time. At the time of
 writing, the following sync-ups are organized.
 The :doc:`CodeOfConduct` applies to all online sync-ups.
 
 If you'd like to organize a new sync-up, please add the info in the table
 below. Please also create a calendar event for it and invite [e-mail]
 to the event, so that it'll show up on the :ref:`llvm-community-calendar`. 
+Please see :ref:`llvm-community-calendar-host-guidance` for more guidance on
+what to add to your calendar invite.
 
 .. list-table:: LLVM regular sync-up calls
    :widths: 25 25 25 25
    :header-rows: 1
 
    * - Topic
      - Frequency
      - Calendar link

 
 Guidance for office hours hosts
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 * If you're interested in becoming an office hours host, please add your
   information to the list above. Please create a calendar event for it and
   invite [e-mail] to the event so that it'll show up on the 
   :ref:`llvm-community-calendar`.
+  Please see :ref:`llvm-community-calendar-host-guidance` for more guidance on
+  what to add to your calendar invite.
 * When starting an office hours session, consider typing something like "*Hi,
   I'm available for chats in the next half hour at* video chat URL. *I'm
   looking forward to having conversations on the video chat or here.*" on the
   LLVM chat channels that you are already on. These could include:
 
     * the `#office-hours Discord channel
       <https://discord.com/channels/636084430946959380/976196303681896538>`__.
     * :ref:`IRC`

 community such as :ref:`online-sync-ups` and :ref:`office-hours`. The calendar
 can be found at
 https://calendar.google.com/calendar/u/0/embed?src=[e-mail] and can
 also be seen inline below:
 
 .. raw:: html
 
     <iframe src="https://calendar.google.com/calendar/embed?height=600&wkst=1&bgcolor=%23ffffff&ctz=UTC&showCalendars=0&showDate=1&showNav=1&src=Y2FsZW5kYXJAbGx2bS5vcmc&color=%23039BE5" style="border:solid 1px #777" width="800" height="600" frameborder="0" scrolling="no"></iframe>
+
+.. _llvm-community-calendar-host-guidance:
+
+Guidance on what to put into LLVM community calendar invites
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Please do put the following pieces of information in your calendar invite:
+
+* Write a single paragraph describing what the event is about.
+* State explicitly that the :doc:`CodeOfConduct` applies to this event.
+* Make it clear who:
+
+  * the organizer is.
+
+  * the person to contact is in case of any code-of-conduct issues.  Typically,
+    this would be the organizer.
+
+* If you have meeting minutes for your event, add a pointer to where those live.
+  A good place for meeting minutes could be as a post on LLVM Discourse.