docs: point community meeting calendar to LFX platform

The Envoy community calendar has moved to the LFX meetings platform. The
old Google group calendar was no longer being scheduled (last occurrence
was June 25), and the per-timezone "Add to your calendar" links were
pinned to stale one-off occurrences with no equivalent on LFX.

Repoint the community calendar link to the LFX Envoy meetings page and
drop the stale Google template links.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Huabing (Robin) Zhao <zhaohuabing@gmail.com>

Author: zhaohuabing

README.md

@@ -41,15 +41,13 @@ If you've found a security vulnerability or a process crash, please follow the i
 
 Envoy Gateway contributor meetings are held on Thursdays and alternate weekly between EU-friendly and APAC-friendly times.
 
-* EU-friendly: Thursdays at 7:00 AM PST / 10:00 AM EST / 4:00 PM CET. [Add to your calendar][eu-calendar]
-* APAC-friendly: Thursdays at 4:00 PM PST / 7:00 PM EST / 8:00 AM CST. [Add to your calendar][apac-calendar]
-* Full Envoy community calendar is available [here][community-calendar].
+* EU-friendly: Thursdays at 7:00 AM PST / 10:00 AM EST / 4:00 PM CET.
+* APAC-friendly: Thursdays at 4:00 PM PST / 7:00 PM EST / 8:00 AM CST.
+* Full Envoy community calendar is available [here][community-calendar], where you can view meeting details and add them to your calendar.
 * Meeting notes and agenda: [Meeting details][meeting]
 
 [meeting]: https://docs.google.com/document/d/1i5wa1VsxIbQw7jbWvGmvy8C4Zpp7SGV1aVViSLgqU4M/edit?usp=sharing
-[eu-calendar]: https://calendar.google.com/calendar/event?action=TEMPLATE&tmeid=djQ1NWRhM2xjbG5vdGdpbXZibHM5MWxiOWdfMjAyNTEyMTFUMTUwMDAwWiA4YnNmYzhtMmRmOG1hZDJqdGdmNmY4b25qNEBn&tmsrc=8bsfc8m2df8mad2jtgf6f8onj4%40group.calendar.google.com&scp=ALL
-[apac-calendar]: https://calendar.google.com/calendar/event?action=TEMPLATE&tmeid=MW80N2FmZDhyZmZoNnBrbTdnbnN1Y3M0dGJfMjAyNTEyMTlUMDAwMDAwWiA4YnNmYzhtMmRmOG1hZDJqdGdmNmY4b25qNEBn&tmsrc=8bsfc8m2df8mad2jtgf6f8onj4%40group.calendar.google.com&scp=ALL
-[community-calendar]: https://calendar.google.com/calendar/u/0/embed?src=8bsfc8m2df8mad2jtgf6f8onj4@group.calendar.google.com&ctz=America/Chicago
+[community-calendar]: https://zoom-lfx.platform.linuxfoundation.org/meetings/envoy?view=week
 [blog]: https://blog.envoyproxy.io/introducing-envoy-gateway-ad385cc59532
 [Envoy Slack workspace]: https://communityinviter.com/apps/envoyproxy/envoy
 [Envoy Gateway channel]: https://envoyproxy.slack.com/archives/C03E6NHLESV