[doc] install required python3-dev apt package (vllm-project#16888)

Signed-off-by: David Xia <david@davidxia.com>

Author: davidxia

docs/source/getting_started/installation/cpu/build.inc.md

@@ -2,7 +2,7 @@ First, install recommended compiler. We recommend to use `gcc/g++ >= 12.3.0` as
 
 ```console
 sudo apt-get update -y
-sudo apt-get install -y gcc-12 g++-12 libnuma-dev
+sudo apt-get install -y gcc-12 g++-12 libnuma-dev python3-dev
 sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 10 --slave /usr/bin/g++ g++ /usr/bin/g++-12
 ```