Docs: add dbipCountryMMDB input format

Author: Loyalsoldier

README.md

@@ -98,6 +98,7 @@ Supported `input` formats:
 - **cutter**: Remove data from previous steps
 - **maxmindGeoLite2CountryCSV**: Convert MaxMind GeoLite2 country CSV data to other formats
 - **maxmindMMDB**: Convert MaxMind country mmdb database to other formats
+- **dbipCountryMMDB**: Convert DB-IP lite country mmdb database to other formats
 - **private**: Convert LAN and private network CIDR to other formats
 - **text**: Convert plaintext IP and CIDR to other formats
 - **v2rayGeoIPDat**: Convert V2Ray GeoIP dat to other formats