Fix typo

roles/custom/matrix-synapse-admin/defaults/main.yml

@@ -1,5 +1,5 @@
 ---
-# matrix-synapse-admin is a web UI for mananging the Synapse Matrix server
+# matrix-synapse-admin is a web UI for managing the Synapse Matrix server
 # Project source code URL: https://github.com/Awesome-Technologies/synapse-admin
 # Fork source code URL: https://github.com/etkecc/synapse-admin