Update README.md

Author: Jason2866

README.md

@@ -6,8 +6,9 @@ Tested on Ubuntu.
 
 ### Build on Ubuntu
 ```bash
-sudo apt-get install git wget curl libssl-dev libncurses-dev flex bison gperf python3 python3-pip python3-setuptools python3-serial python3-click python3-cryptography python3-future python3-pyparsing python3-pyelftools cmake ninja-build ccache
-sudo pip install --upgrade pip
+sudo apt-get install -y git wget curl libssl-dev libncurses-dev flex bison gperf python3 cmake ninja-build ccache
+curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py && python3 get-pip.py && \
+pip3 install setuptools pyserial click future wheel cryptography pyparsing pyelftools
 git clone https://github.com/Jason2866/esp32-arduino-lib-builder
 cd esp32-arduino-lib-builder
 ./build.sh