ci: Update python version for ESP8266

Author: windowsair

.github/workflows/main.yml

@@ -29,9 +29,9 @@ jobs:
       if: matrix.target-hardware == 'esp8266'
       run: |
         sudo apt update
-        sudo apt install -y gcc git wget make libncurses-dev flex bison python python-setuptools python3-serial ninja-build
+        sudo apt install -y gcc git wget make libncurses-dev flex bison python-is-python3 python3-setuptools python3-serial ninja-build
         wget https://dl.espressif.com/dl/xtensa-lx106-elf-linux64-1.22.0-100-ge567ec7-5.2.0.tar.gz
-        curl https://bootstrap.pypa.io/pip/2.7/get-pip.py -o get-pip.py
+        curl https://bootstrap.pypa.io/pip/3.4/get-pip.py -o get-pip.py
         python get-pip.py
 
     - name: install