Fix github action build

Fixed dependency isses in github actions

Author: amielcza

documentation/build_ubuntu.md

@@ -15,7 +15,7 @@ SPDX-License-Identifier: MIT
 Building IGC needs flex, bison, libz and cmake version at least 3.13.4. You can install required packages on Ubuntu using this command:
 
 ```shell
-$ sudo apt-get install flex bison libz-dev cmake
+$ sudo apt-get install flex bison libz-dev cmake libc6 libstdc++6
 ```
 
 Some of the incoming git operations will try to download and apply patches. For this purpose it is necessary to setup git credentials if they are not already in the git configuration:

scripts/buildIGC.sh

@@ -49,7 +49,7 @@ else
 fi
 
 apt-get update
-apt-get install -y flex bison libz-dev cmake curl wget build-essential git software-properties-common unzip file lsb-release python3-mako
+apt-get install -y flex bison libz-dev cmake curl wget build-essential git software-properties-common unzip file lsb-release python3-mako libc6 libstdc++6
 echo "[Build Status] flex bison libz-dev cmake curl wget build-essential git software-properties-common unzip file INSTALLED"
 
 if [ "$UBUNTU_VERSION" = "20.04" ]; then