Fix odd typo in table prefix detection pattern

Author: rastating

lib/wpxf/wordpress/hash_dump.rb

@@ -195,7 +195,7 @@ def determine_prefix
     return nil unless res&.code == 200
 
     # If the prefix is found, regardless of the row mode, return it.
-    @table_prefix = res.body[/#{bof_token}\:([^,]+?)usermeta\:#{eof_token}/, 1]
+    @table_prefix = res.body[/#{bof_token}\:([^:]+?)usermeta\:#{eof_token}/, 1]
     return @table_prefix if @table_prefix
     return nil unless reveals_one_row_per_request