[CI]fix the install error of env tools

.github/workflows/action.yml

@@ -164,6 +164,7 @@ jobs:
           sudo apt-get -qq install gcc-multilib libsdl-dev libncurses5-dev scons
           sudo python -m pip install --upgrade pip -qq
           pip install requests -qq
+          git config --global http.postBuffer 524288000
           python -c "import tools.menuconfig; tools.menuconfig.touch_env()"
           echo "RTT_ROOT=${{ github.workspace }}" >> $GITHUB_ENV
           echo "RTT_CC=gcc" >> $GITHUB_ENV