formatting: add full stops to section descriptions

README.md

@@ -447,7 +447,7 @@ Mailing lists servers and mass mailing software - one message to many recipients
 
 **[`^        back to top        ^`](#)**
 
-[IRC](https://en.wikipedia.org/wiki/Internet_Relay_Chat) communication software
+[IRC](https://en.wikipedia.org/wiki/Internet_Relay_Chat) communication software.
 
 - [Convos](https://convos.chat/) - Always online web IRC client. ([Demo](https://convos.chat/#instant-demo), [Source Code](https://github.com/nordaaker/convos)) `Artistic-2.0` `Perl`
 - [Dispatch](https://github.com/khlieng/dispatch) - Self-hosted web IRC client written in Go. `MIT` `Go`