Update GitHub Action Runner Image to ubuntu-latest

[HRMNYWaage]

Hello,

I encountered an issue while trying to set up the pipeline using the instructions provided in the project's README. My GitHub Action job was blocked, and upon investigation, I discovered that the problem arose from the use of the ubuntu-18.04 image, which GitHub has since removed. For me, switching to ubuntu-latest resolved the issue. It might be a good idea to consider making this change to the project's GitHub Actions configuration to prevent similar issues for others.

Here is the link to the official announcement regarding the deprecation of the ubuntu-18.04 Actions runner image:
GitHub Blog - Deprecation of ubuntu-18.04 Actions Runner Image

Best Regards