Change version to 5.11 in antora.yml (#701)

Updated version and display version to 5.11 in antora.yml.

Author: g-donev

docs/antora.yml

@@ -1,21 +1,21 @@
 name: management-center
 title: Management Center
 # Version in the URL
-version: '5.12-snapshot'
+version: '5.11'
 # Version in the version selector
-display_version: '5.12-SNAPSHOT'
+display_version: '5.11'
 prerelease: true
 asciidoc:
   attributes:
     # product name variables
     open-source-product-name: 'Community Edition'
     enterprise-product-name: 'Enterprise Edition'
     # The full major.minor.patch version, which is used as a variable in the docs for things like download links
-    full-version: '5.12.0-SNAPSHOT'
-    snapshot: true
+    full-version: '5.11.0'
+    snapshot: false
     javasource: ROOT:example$
-    mc-repo-swagger-branch: 'master'
-    page-latest-supported-hazelcast: '5.7-snapshot'
+    mc-repo-swagger-branch: '5.11.0'
+    page-latest-supported-hazelcast: '5.7'
     # https://github.com/hazelcast/hazelcast-commandline-client/releases
     page-latest-supported-clc: '5.5.1'
     page-toclevels: 1