trivial: Add missing space

Author: kwin

README.md

@@ -14,7 +14,7 @@ There are several validators included in this artifact, all relate to namespacin
 
 1. [FileVault Content Package Filter][filevault-workspace-filter] (`root` attribute of each `filter` element)
 1. [FileVault Content Package ID][filevault-package-id] (both `group` and optionally `name` package properties)
-1. [Oak Authorizables][oak-authorizables](`rep:principalName` and optionally `rep:authorizableId` properties of users/groups)
+1. [Oak Authorizables][oak-authorizables] (`rep:principalName` and optionally `rep:authorizableId` properties of users/groups)
 1. [Oak Query Index Definition][oakindex] (path restrictions for [Lucene][oakindex-lucene-pathrestrictions] or [Property][oakindex-property-pathrestrictions] index definitions)
 1. [OSGi Configuration][osgi-installer-configurations]
 1. [Sling Resource Type and Resource Super Type][sling-resource-type] (`sling:resourceType` and `sling:resourceSuperType` properties)