Fix formatting

Signed-off-by: Rūdolfs Ošiņš <[email protected]>

Author: rudolfs

README.md

@@ -1,11 +1,11 @@
-⚠️ Upstream has been sunsetted ⚠️
+# ⚠️ Upstream has been sunsetted ⚠️
 
 Read more about it [here](https://radicle.community/t/upstream-july-2022-community-update).
 To discover and interact with projects on the Radicle protocol, please use the
 [web app](https://app.radicle.network) and [Radicle CLI](https://radicle.network)
 tooling.
 
-# Upstream
+-------------------------------------------------------------------------------
 
 Upstream is a cross-platform desktop client for the Radicle code collaboration
 protocol.