Added a dot in installation.mdx

Author: LucaVmu

docs/installation.mdx

@@ -28,7 +28,7 @@ Do not downgrade Nyxian! You will lose all your data!
 
       :::warning
 
-      Nyxian will only work, if sideloaded with an apple developer account (free or paid)  
+      Nyxian will only work, if sideloaded with an apple developer account (free or paid).  
       **It will not work in LiveContainer!**
 
       :::