Set version number and alias as DocSearch versions

Author: Simran-B

site/themes/arangodb-docs-theme/layouts/partials/meta.html

@@ -14,8 +14,9 @@
 <meta name="author" content="{{ . }}">
 {{- end }}
 {{- $versionShort := .Page.Store.Get "versionShort" }}
-{{- with $versionShort }}
-<meta name="docsearch:version" content="{{ . }}">
+{{- $versionAlias := .Page.Store.Get "alias" }}
+{{- if $versionShort }}
+<meta name="docsearch:version" content="{{ $versionShort }}{{ if ne $versionShort $versionAlias }},{{ $versionAlias }}{{ end }}">
 {{- end }}
 {{- if (hasPrefix .Path "/arangodb/") }}
   {{- if or (.Page.Store.Get "deprecated") (.Page.Store.Get "inDevelopment") }}<meta name="robots" content="noindex">{{ end }}