Removes unnecessary new line

Co-authored-by: jheysel-r7 <[email protected]>

Author: msutovsky-r7

documentation/modules/exploit/linux/http/pivotx_index_php_overwrite.md

@@ -22,7 +22,6 @@ Install steps:
 1. Do: `run`
 
 ## Options
-
 ### USERNAME
 
 PivotX username.