Small readme fix (soxoj#857)

Author: soxoj

README.md

@@ -23,7 +23,7 @@
 
 **Maigret** collects a dossier on a person **by username only**, checking for accounts on a huge number of sites and gathering all the available information from web pages. No API keys required. Maigret is an easy-to-use and powerful fork of [Sherlock](https://github.com/sherlock-project/sherlock).
 
-Currently supported more than 2500 sites ([full list](https://github.com/soxoj/maigret/blob/main/sites.md)), search is launched against 500 popular sites in descending order of popularity by default. Also supported checking of Tor sites, I2P sites, and domains (via DNS resolving).
+Currently supported more than 3000 sites ([full list](https://github.com/soxoj/maigret/blob/main/sites.md)), search is launched against 500 popular sites in descending order of popularity by default. Also supported checking of Tor sites, I2P sites, and domains (via DNS resolving).
 
 ## Main features