Update latest supported MC to 5.11-snapshot

Author: GitHub Actions Bot

docs/antora.yml

@@ -24,7 +24,7 @@ asciidoc:
     # All page-latest attributes are used as a variable in the docs for things like download links and search results
     page-latest-cli: '5.2021.09'
     # Must be lowercase because this is how the version appears in the docs
-    page-latest-supported-mc: '5.10-snapshot'
+    page-latest-supported-mc: '5.11-snapshot'
     page-latest-supported-mc-installer: 'latest-snapshot'
     page-latest-supported-po: 'latest-snapshot'
     # https://github.com/hazelcast/hazelcast-go-client/releases