Merge pull request #92 from pugnascotia/ldap-realm-fix-typo

Fix typo in LDAP realm docs

Author: pugnascotia

docs/en/stack/security/authentication/ldap-realm.asciidoc

@@ -46,7 +46,7 @@ associated with the authenticated user. Roles define the privileges a user has
 in the cluster.
 
 Since with the `ldap` realm the users are managed externally in the LDAP server,
-the expectation is that their roles are managed there as well. If fact, LDAP
+the expectation is that their roles are managed there as well. In fact, LDAP
 supports the notion of groups, which often represent user roles for different
 systems in the organization.