I try to test my platformio via github actions. With travis it seems to work fine:

• https://github.com/TheZoker/Marlin/blob/ender-3/.travis.yml
• https://travis-ci.com/TheZoker/Marlin/builds/124277084

Via github actions, I get the following error:

Error: Not a PlatformIO project. platformio.ini file has not been found in current working directory (/home/runner/work/Marlin/Marlin/platformio.ini). To initialize new project please use platformio init command

• https://github.com/TheZoker/Marlin/blob/ender-3/.github/workflows/main.yml
• https://github.com/TheZoker/Marlin/commit/50fbf2b049dbeb2cf40bb337e97945ef3eac6bd4/checks#step:5:14

Can anybody help me to resolve this? Do I need to change the working directory?

Thank you very much!