Update README.md

Co-authored-by: Kazunori Kimura <33391846+kkimurak@users.noreply.github.com>

Author: antt1995

README.md

@@ -54,7 +54,7 @@
     - [Piwik](#piwik)
     - [Feature flags](#feature-flags)
     - [Exposing ssh port in dockerized gitlab-ce](docs/exposing-ssh-port.md)
-    - [Gitlab KAS](#Gitlab KAS)
+    - [Gitlab KAS](#Gitlab-KAS)
     - [Available Configuration Parameters](#available-configuration-parameters)
 - [Maintenance](#maintenance)
     - [Creating Backups](#creating-backups)