Update pihole man page for regex

Signed-off-by: Mcat12 <newtoncat12@yahoo.com>

manpages/pihole.8

@@ -68,7 +68,7 @@ Available commands and options:
 
 \fB-wild, wildcard\fR [options] [<domain1> <domain2 ...>]
 .br
-    Add or removes specified domain, and all subdomains to the blacklist
+    Add or removes specified regex pattern to the regex blacklist
 .br
 
     (Whitelist/Blacklist manipulation options):
@@ -277,7 +277,7 @@ Some usage examples
 .br
     \fBpihole -b -d noads.example.com\fR  Remove "noads.example.com" from blacklist
 .br
-    \fBpihole -wild example.com\fR        Add "example.com" as wildcard - would block ads.example.com, www.example.com etc.
+    \fBpihole -wild ^example.*$\fR        Add "^example.*$" as a regex pattern - would block all domains starting with "example"
 .br
 
     Changing the Web Interface password