Update 2.1.-Installation.md

Author: qwertygc

docs/doc/en/2.1.-Installation.md

@@ -1,5 +1,6 @@
 ---
 path: 2.1.-Installation
+icon: lucide/package-open
 ---
 
 # QualCoder Installation and running instructions
@@ -69,13 +70,14 @@ Remove the back ticks that surround the command line instructions ` as these are
 
 ### Fedora Linux
 
+!!! warning "Prerequisites"
+    There is an ongoing problem with audio/video coding on Linux Fedora -- the software crashes.
+
 These instructions download the current source code directly from GitHub. Note: Fedora uses Wayland which may not work well with the Qt graphical interface. It is suggested you also install Xwayland.
 
 Download the source code. Read and apply the section for Fedora source code usage in the **Readme.md** file.
 Remove the back ticks that surround the command line instructions ` as these are used for display only.
 
-There may be problems with QualCoder working with audio / video in Fedora.
-
 ### Arch/Manjaro Linux
 
 Download the source code. Read and apply the section for Arch source code usage in the **Readme.md** file.