Fix date for Hack Night #27 in Copenhagen (#3482)

See https://www.meetup.com/copenhagen-rust-meetup-group/events/287057762/

Author: troelsarvin

content/2022-07-20-this-week-in-rust.md

@@ -286,7 +286,7 @@ Rusty Events between 2022-07-20 - 2022-08-17 🦀
     * [**Rust Wrocław Meetup #27**](https://www.meetup.com/rust-wroclaw/events/287023750/)
 * 2022-07-27 | Amsterdam, NL | [Rust Developers Amsterdam Group](https://www.meetup.com/rust-amsterdam-group/)
     * [**Rust Developers Amsterdam Group**](https://www.meetup.com/rust-amsterdam-group/events/287019877/)
-* 2022-07-30 | Copenhagen, DK | [Copenhagen Rust Group](https://cph.rs/)
+* 2022-07-28 | Copenhagen, DK | [Copenhagen Rust Group](https://cph.rs/)
     * [**Hack Night #27**](https://www.meetup.com/copenhagen-rust-meetup-group/events/287057762/)
 * 2022-08-02 | London, UK | [Rust London User Group](https://www.meetup.com/Rust-London-User-Group/)
     * [**Rust London Code Dojo: Rust with Front-End Web Assembly**](https://www.meetup.com/rust-london-user-group/events/287271789/)