Revert back to 7.6.0

See filegator/filegator#270

Author: jaapmarcus

install/upgrade/upgrade.conf

@@ -60,7 +60,7 @@ rc_v="1.4.11"
 rl_v="1.16.0"
 
 # Set version of File manager to update during upgrade if not already installed
-fm_v="7.7.0"
+fm_v="7.6.0"
 
 # Set version of PHPMailer to update during upgrade if not already installed
 pm_v="6.5.0"