README: Minor improvement to Ubuntu quickstart

Strictly speaking, `git` may need to be installed to on a fresh
Ubuntu system, so reorder the git clone and apt install steps,
and add git to the latter.

Signed-off-by: Hanno Becker <[email protected]>

Author: hanno-becker

README.md

@@ -22,14 +22,14 @@ bounds accesses, nor integer overflows during optimized modular arithmetic.
 ## Quickstart for Ubuntu
 
 ```bash
+# Install base packages
+sudo apt-get update
+sudo apt-get install make gcc python3 git
+
 # Clone mlkem-native
 git clone https://github.com/pq-code-package/mlkem-native.git
 cd mlkem-native
 
-# Install base packages
-sudo apt-get update
-sudo apt-get install make gcc python3
-
 # Build and run base tests
 make quickcheck