Add man change for volume filter
It was forgetton to add change in man for new-added volume filters.
This change adds that.
@@ -18,7 +18,10 @@ There is a single supported filter `dangling=value` which takes a boolean of `tr
# OPTIONS
**-f**, **--filter**=""
- Provide filter values (i.e. 'dangling=true')
+ Filter output based on these conditions:
+ - dangling=<boolean> a volume if referenced or not
+ - driver=<string> a volume's driver name
+ - name=<string> a volume's name
**--help**
Print usage statement
