Merge pull request #5036 from RobinWagner/patch-17

Update system requirements for OpenProject 6.1

doc/operation_guides/system_requirements.md

@@ -43,8 +43,7 @@ strive to make OpenProject easy and fun to use we had to drop support
 for some older browsers.
 
 * [Mozilla Firefox](https://www.mozilla.org/en-US/firefox/products/) (Version >= 38 ESR)
-* [Microsoft Internet
-  Explorer](http://windows.microsoft.com/en-us/internet-explorer/download-ie) (Version >= 11)
+* [Microsoft Egde](https://www.microsoft.com/de-de/windows/microsoft-edge)
 * [Google Chrome](https://www.google.com/chrome/browser/desktop/)
 
 ## Screen reader support (accessibility)