📝 Remove ubuntu 20.04 version from setup

Its old and its not easy to support each version of Ubuntu when we
depend on what version of GCC is supported by the Ubuntu package repo
or the /test PPA.

mkdocs/getting_started.md

@@ -5,10 +5,10 @@
 What you will need in order to get started with libhal.
 
 - `python`: 3.10 or above
-- `conan`: 2.0.13 or above
+- `conan`: 2.1.0 or above
 - Suitable Compiler for running host tests (can be either of these):
-  - `gcc`: 11.3.0 or above
-  - `clang`: 14 and above
+  - `gcc`: 12.3.0 or above
+  - `clang`: 17 and above
 
 === "Ubuntu 22.04"
 
@@ -19,45 +19,21 @@ What you will need in order to get started with libhal.
     ```
     sudo apt update && sudo apt upgrade
     sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
-    sudo apt install -y build-essential g++-11
+    sudo apt install -y build-essential g++-12
     ```
 
-    Install `clang-tidy-16`:
+    Install `clang-tidy-17`:
 
     ```
     wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-    sudo add-apt-repository "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-16 main"
-    sudo apt-get install clang-tidy-16
+    sudo add-apt-repository "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-17 main"
+    sudo apt-get install clang-tidy-17
     ```
 
     Installing conan:
 
     ```
-    python3 -m pip install "conan>=2.0.13"
-    ```
-
-=== "Ubuntu 20.04"
-
-    Install python3.10, GCC, and make (from build essentials):
-
-    ```
-    sudo apt update && sudo apt upgrade
-    sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
-    sudo apt install -y build-essential g++-11 python3.10
-    ```
-
-    Install `clang-tidy-16`:
-
-    ```
-    wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-    sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-16 main"
-    sudo apt-get install clang-tidy-16
-    ```
-
-    Installing conan:
-
-    ```
-    python3.10 -m pip install "conan>=2.0.13"
+    python3 -m pip install "conan>=2.1.0"
     ```
 
 === "MacOS X"
@@ -77,7 +53,7 @@ What you will need in order to get started with libhal.
     Install conan:
 
     ```
-    python3 -m pip install "conan>=2.0.9"
+    python3 -m pip install "conan>=2.1.0"
     ```
 
     Make `clang-tidy` available on the command line:
@@ -86,19 +62,12 @@ What you will need in order to get started with libhal.
     sudo ln -s $(brew --prefix llvm)/bin/clang-tidy /usr/local/bin/
     ```
 
-    Install conan:
-
-    ```
-    python3 -m pip install "conan>=2.0.13"
-    ```
-
     Install Rosetta (only required for M1 macs):
 
     ```
     /usr/sbin/softwareupdate --install-rosetta --agree-to-license
     ```
 
-    Rosetta necessary for intel based cross compilers:
 
 === "Windows"
 
@@ -126,13 +95,13 @@ What you will need in order to get started with libhal.
     Install clang-tidy 16 (via llvm):
 
     ```powershell
-    choco install llvm --version=16.0.6
+    choco install llvm --version=17.0.6
     ```
 
     Installing conan:
 
     ```powershell
-    python3 -m pip install -U "conan>=2.0.13"
+    python3 -m pip install -U "conan>=2.1.0"
     ```
 
 ---