url fix

README.md

@@ -12,7 +12,7 @@ Your SIP PBX should be comaptible with `L16@48000` or `OPUS@48000` voice codec.
 
 1. Download prebuild versions for supported OS from CI or compile it yourself.  
 [Ubuntu 18.04 Bionic](https://ci.appveyor.com/api/projects/Infactum/tg2sip/artifacts/tg2sip_bionic.zip?branch=master&job=Environment%3A%20target_name%3DUbuntu%20Bionic%2C%20docker_tag%3Dbionic)  
-[CentOS 7](https://ci.appveyor.com/api/projects/Infactum/tg2sip/artifacts/tg2sip_centos7.zip?branch=master&job=Environment%3A%20target_name%3DUbuntu%20Bionic%2C%20docker_tag%3Dcentos7)  
+[CentOS 7](https://ci.appveyor.com/api/projects/Infactum/tg2sip/artifacts/tg2sip_centos7.zip?branch=master&job=Environment%3A%20target_name%3DCentOS%207%2C%20docker_tag%3Dcentos7)  
 Prebuild binaries requires OPUS libraries (`libopus0` for Ubuntu, `opus` for CentOS, etc).
 2. Obtain `api_id` and `api_hash` tokens from [this](https://my.telegram.org) page and put them in `settings.ini` file.
 3. Login into telegram with `gen_db` app