docs: fix community call calendar link, slack instructions (#1546)

* docs: fix community call calendar link

Provides instructions on how to get the Community Call recurring meeting invite (which can be done via the same meeting link).

Signed-off-by: Juan Escalada <97265671+jescalada@users.noreply.github.com>

* docs: fix/clarify slack access in README

Signed-off-by: Juan Escalada <97265671+jescalada@users.noreply.github.com>

* Update README.md

Co-authored-by: Kris West <kristopher.west@natwest.com>
Signed-off-by: Juan Escalada <97265671+jescalada@users.noreply.github.com>

---------

Signed-off-by: Juan Escalada <97265671+jescalada@users.noreply.github.com>
Co-authored-by: Kris West <kristopher.west@natwest.com>

Author: jescalada

README.md

@@ -114,12 +114,12 @@ This project is distributed under the Apache-2.0 license. See [`LICENSE`](LICENS
 
 ## Contact
 
-Drop a note, ask a question or just say hello in our community Slack channel, which is accessible via the [FINOS Slack Workspace](https://finos-lf.slack.com) 👋
+Drop a note, ask a question or just say hello in our community Slack channel [#git-proxy](https://finos-lf.slack.com/archives/C06LXNW0W76), which is accessible via the [FINOS Slack Workspace](https://finos-lf.slack.com) 👋
 
-If you can't access Slack, you can also [subscribe to our mailing list](mailto:git-proxy+subscribe@lists.finos.org) 📨
+If you can't join, you can send us an e-mail to [help@finos.org](mailto:help@finos.org) to get access. You can also [subscribe to our mailing list](mailto:git-proxy+subscribe@lists.finos.org) and stay tuned for any updates 📨
 
 Otherwise, if you have a deeper query or require more support, please [raise an issue](https://github.com/finos/git-proxy/issues) 🧵
 
 🤝 Join our [fortnightly Zoom meeting](https://zoom-lfx.platform.linuxfoundation.org/meeting/95849833904?password=99413314-d03a-4b1c-b682-1ede2c399595) on Monday, 4PM BST (odd week numbers).  
 🌍 [Convert to your local time](https://www.timeanddate.com/worldclock)  
-📅 [Click here](https://calendar.google.com/calendar/event?action=TEMPLATE&tmeid=MTRvbzM0NG01dWNvNGc4OGJjNWphM2ZtaTZfMjAyNTA2MDJUMTUwMDAwWiBzYW0uaG9sbWVzQGNvbnRyb2wtcGxhbmUuaW8&tmsrc=sam.holmes%40control-plane.io&scp=ALL) for the recurring Google Calendar meeting invite. Alternatively, send an e-mail to [help@finos.org](https://zoom-lfx.platform.linuxfoundation.org/meeting/95849833904?password=99413314-d03a-4b1c-b682-1ede2c399595#:~:text=Need-,an,-invite%3F) to get a calendar invitation.
+📅 [Click here](https://zoom-lfx.platform.linuxfoundation.org/meeting/95849833904?password=99413314-d03a-4b1c-b682-1ede2c399595&invite=true) and complete the form to receive the recurring calendar meeting invite. Alternatively, send an e-mail to [help@finos.org](mailto:help@finos.org) requesting a calendar invitation.