Modifications done on the Arch Linux installation guide :

- Deleted a command to install a package on a Debian based distro.

- Added package required to build and run properly the app (libfido2, cmake, libcbor).

- Unified pacman command to install package in the same line.

README.md

@@ -103,6 +103,8 @@ To allow coexistence with the original tool, our version will be compiled and in
 ```bash
 git clone https://github.com/Token2/fido2-manage.git
 
+sudo pacman -S libfido2 cmake libcbor tk
+
 cd fido2-manage
 
 rm -rf build && mkdir build && cd build && cmake -USE_PCSC=ON ..
@@ -117,10 +119,6 @@ sudo ldconfig
 
 chmod 755 fido2-manage.sh
 
-sudo apt install -y python3-tk
-
-sudo pacman -S tk
-
 python3 gui.py
 
 ```