Add information about mailing list to get invite to SIG meeting (asyn…

…capi#311)

README.md

@@ -87,7 +87,7 @@ Check out the [examples](https://github.com/asyncapi/asyncapi/blob/master/exampl
 
 ## Meetings
 
-We meet every other Tuesday at 6:00 PM CET. Check out our [calendar](https://calendar.google.com/calendar?cid=dGJyYmZxNGRlNWJjbmd0OG9rdmV2NGxzdGtAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbQ) to see when we're meeting next.
+We meet every other Tuesday at 6:00 PM CET. Check out our [calendar](https://calendar.google.com/calendar?cid=dGJyYmZxNGRlNWJjbmd0OG9rdmV2NGxzdGtAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbQ) to see when we're meeting next or join [this](https://groups.google.com/forum/#!forum/asyncapi-users) mailing list go get an invite to the next meeting.
 
 Join from your favorite device: https://zoom.us/j/165106914
 
@@ -107,7 +107,7 @@ Meeting ID: 165 106 914
 * [+44 203 695 0088](tel:+442036950088)
 * [+44 203 051 2874](tel:+442030512874)
 
-Find the agenda for our past and future meetings [here](https://github.com/asyncapi/asyncapi/issues?utf8=%E2%9C%93&q=is%3Aissue+label%3Ameeting+sort%3Acreated-desc+).
+Find the agenda for our past and future meetings [here](https://github.com/asyncapi/asyncapi/issues?utf8=%E2%9C%93&q=is%3Aissue+label%3Ameeting+sort%3Acreated-desc+) in the pinned issue.
 
 ## Meeting recordings