Fix link to Twitter space recording

One of the two recordings has been removed
from Twitter, the link 404's now.

docs/monthly-update/2022/04.md

@@ -66,12 +66,7 @@ There's a lot on the horizon and we're enthusiastic about the rest of this year!
 
 [Hernando](https://github.com/hcastano) was a guest at the spanish Polkadot
 Twitter Space. The space has been recorded:
-
-* https://twitter.com/i/spaces/1MnGnkgmNdBJO
-* https://twitter.com/i/spaces/1jMKgedkMgYJL
-
-The network connection of the organizer had a bad day, hence it's two
-recordings.
+[https://twitter.com/i/spaces/1MnGnkgmNdBJO](https://twitter.com/i/spaces/1MnGnkgmNdBJO).
 
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