Update docs/victorialogs/README.md

Co-authored-by: Roman Khavronenko <[email protected]>

Author: AndrewChubatiuk

docs/victorialogs/README.md

@@ -328,7 +328,7 @@ cloud provider, or third-party tools. Note that the snapshot must be **consisten
 ## vmalert
 
 VictoriaLogs is capable of proxying requests to [VMAlert](https://docs.victoriametrics.com/victorialogs/vmalert/)
-when `-vmalert.proxyURL` flag is set. Use this feature for accessing VMAlert API through VictoriaLogs Web interface.
+when `-vmalert.proxyURL` flag is set {{% available_from "#" %}}. Use this feature for accessing VMAlert API through VictoriaLogs Web interface.
 
 For accessing VMAlert API through VictoriaLogs configure `-vmalert.proxyURL` flag. All VMAlert endpoints become available at `http://<victorialogs-addr>:9428/select/vmalert`.