doc: update python minimal version to 3.11 according to pyproject.toml requirements [skip-ci]

README.md

@@ -4,7 +4,7 @@ This project provides a CLI tool able to recursively copy/synchronize a GitLab g
 
 ## Install
 
-`gitlab-cp` requires Python 3.10 or higher and can be installed with the following command:
+`gitlab-cp` requires Python 3.11 or higher and can be installed with the following command:
 
 ```bash
 pip install gitlab-cp --index-url https://gitlab.com/api/v4/projects/56596421/packages/pypi/simple