📝 Move python installation down for ubuntu

This movement, along with the info call outs, should make it more clear
that you only need to install python 3.10 from the deadsnakes repo if
you are on Ubuntu 20.04.

mkdocs/getting_started.md

@@ -10,15 +10,6 @@ What you will need in order to get started with libhal.
 
 === "Ubuntu 20.04+"
 
-    Install Python 3.10 (only required for 20.04):
-
-    ```
-    sudo apt update
-    sudo apt install software-properties-common -y
-    sudo add-apt-repository ppa:deadsnakes/ppa
-    sudo apt install Python3.10
-    ```
-
     Install `llvm` toolchain & APT repos:
 
     ```
@@ -33,6 +24,17 @@ What you will need in order to get started with libhal.
     sudo apt install libc++-17-dev libc++abi-17-dev
     ```
 
+    !!! info
+
+        If you are using 20.04 you will need to upgrade Python to 3.10:
+
+        ```
+        sudo apt update
+        sudo apt install software-properties-common -y
+        sudo add-apt-repository ppa:deadsnakes/ppa
+        sudo apt install Python3.10
+        ```
+
     Installing conan:
 
     ```