How to download and setup install-qt-action
Open terminal and run command
                                            git clone https://github.com/jurplel/install-qt-action.git
                                        
                                        git clone is used to create a copy or clone of install-qt-action repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with install-qt-action https://github.com/jurplel/install-qt-action/archive/master.zip
Or simply clone install-qt-action with SSH
                                            [email protected]:jurplel/install-qt-action.git                                    
                                    If you have some problems with install-qt-action
You may open issue on install-qt-action support forum (system) here: https://github.com/jurplel/install-qt-action/issuesSimilar to install-qt-action repositories
Here you may see install-qt-action alternatives and analogs
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