Update Filemanager version to the last version

Author: jaapmarcus

install/upgrade/upgrade.conf

@@ -59,4 +59,4 @@ rc_v="1.4.11"
 rl_v="1.15.0"
 
 # Set version of File manager to update during upgrade if not already installed
-fm_v="7.5.0"
+fm_v="7.5.1"