Update how to start JabRef Linux Portable

Inspired by issues
- JabRef/jabref#5591
- JabRef/jabref#7295
- https://discourse.jabref.org/t/jabref-5-1-linux-portable/2293

Author: ThiloteE

en/installation.md

@@ -19,10 +19,13 @@ The portable version of JabRef is designed to be run from a USB stick (or simila
 Download it from [downloads.jabref.org](https://downloads.jabref.org). These are generic archive files (e.g., `tar.gz` files for Linux and MacOS, and `zip` files for Windows) which need to be extracted. Inside the archive files you will find the file needed to run JabRef:
 
 * for Windows `JabRef.exe`.
-* for Linux `bin/JabRef`.
+* for Linux
+    - either run`bin/JabRef`
+    - or `/lib/runtime/bin/JabRef`.
 * for Mac, this is the file `JabRef.app`.
 
 Be sure to activate "Load and Save preferences from/to jabref.xml on start-up (memory stick mode)" in Options → Preferences → General.
+Also, if the Linux version of JabRef portable is put into a folder named `bin`, it will not start. Other names are fine, like `apps`.
 
 #### Development version