Update latest and next version numbers in snippet

Author: Joffcom

_snippets/self-hosting/installation/latest-next-version.md

@@ -1,6 +1,6 @@
 /// note | Stable and Beta versions
 n8n releases a new minor version most weeks. The `stable` version is for production use. `beta` is the most recent release. The `beta` version may be unstable. To report issues, use the [forum](https://community.n8n.io/c/questions/12).
 
-Current `stable`: 2.21.5
-Current `beta`: 2.22.0
+Current `stable`: 2.21.7
+Current `beta`: 2.22.1
 ///