[flang][docs] Update flang call details

The technical call has been cancelled, so that text has been removed. The
description of the "general" call has been updated to indicate that it is
intended for both technical and general discussions.

Author: Tarun Prabhu

flang/docs/GettingInvolved.md

@@ -46,26 +46,17 @@ Contributions to Flang are done using GitHub Pull Requests and follow the
 
 ## Calls
 
-### Flang Community Biweekly Call
+### Flang Biweekly Call
 
--   General updates on the Flang project.
--   Join [Flang Community Biweekly Call](https://lanl-us.webex.com/lanl-us/j.php?MTID=mdce13c9bd55202e8071d8128fb953614)
-    - If you prefer to join using a meeting number and password, those can be 
-      found in this [Google Doc](https://docs.google.com/document/d/1Z2U5UAtJ-Dag5wlMaLaW1KRmNgENNAYynJqLW2j2AZQ/). Alternative methods of joining, such as call-in numbers, are also available.
--   Time: Wednesdays, 8:30 a.m. Pacific Time, on the weeks alternating with regular Flang Community Technical Biweekly Call.
+-   Technical discussions as well as general updates on the Flang project.
+-   Join the [Flang Biweekly Call](https://lanl-us.webex.com/lanl-us/j.php?MTID=mdce13c9bd55202e8071d8128fb953614)
+    - If you prefer to join using a meeting number and password, those can be
+      found in this [Google Doc](https://docs.google.com/document/d/1Z2U5UAtJ-Dag5wlMaLaW1KRmNgENNAYynJqLW2j2AZQ/). Alternative methods of joining, such as call-in numbers, are also available there.
+-   Time: Every other Wednesday, 8:30 a.m. Pacific Time
 -   Calendar invite: https://drive.google.com/file/d/1rkfWCtIvQFcxN0Uz8YVwQGoX_BbzT8oc/view?usp=drive_link
 -   Meeting minutes are available in this [Google Doc](https://docs.google.com/document/d/1Z2U5UAtJ-Dag5wlMaLaW1KRmNgENNAYynJqLW2j2AZQ/edit).
 -   Minutes from older meetings were posted on the [Flang forum](https://discourse.llvm.org/c/subprojects/flang). Search for `Flang Biweekly Sync - Notes`.
 
-### Flang Community Technical Biweekly Call
-
--   Technical topics call.
--   Join [Flang Community Technical Biweekly Call](https://teams.microsoft.com/l/meetup-join/19%3ameeting_YWU1NzU4ZjQtOTljOS00NWU1LTg5NjktYTUzOTU3MGEwMzAx%40thread.v2/0?context=%7b%22Tid%22%3a%22f34e5979-57d9-4aaa-ad4d-b122a662184d%22%2c%22Oid%22%3a%223641875c-ef5b-4767-8105-0787a195852f%22%7d)
-    - If you prefer to join using a meeting ID and passcode, those can be 
-      found in this [Google Doc](https://docs.google.com/document/d/1Z2U5UAtJ-Dag5wlMaLaW1KRmNgENNAYynJqLW2j2AZQ/). Alternative methods of joining, such as call-in numbers, are also available.
--   Time: Mondays, 8:30 a.m. Pacific Time, on the weeks alternating with regular Flang Community Biweekly Call.
--   The agenda is in this [Google Doc](https://docs.google.com/document/d/1Z2U5UAtJ-Dag5wlMaLaW1KRmNgENNAYynJqLW2j2AZQ/).
-
 ### LLVM Alias Analysis Technical Call
 
 -   For people working on improvements to LLVM alias analysis.