Update README.md

Author: tobias-loew

README.md

@@ -3260,4 +3260,4 @@ Contributions are welcome and pull-requests will be happily reviewed.
 I only ask that you agree to license any contributions that you make under the MIT license.
 
 If you have general questions about C++ coroutines, you can generally find someone to help
-in the `#coroutines` channel on [Cpplang Slack](https://cpplang.slack.com/) group. 
+in the `#coroutines` channel on [Cpplang Slack](https://cpplang.slack.com/) group.