add reamde for .pytest_cache method - `ensure_readme()`
add reamde for .pytest_cache
method - `ensure_readme()`

txomon/pytest,markshao/pytest,nicoddemus/pytest,tomviner/pytest,The-Compiler/pytest,davidszotten/pytest,nicoddemus/pytest,The-Compiler/pytest,RonnyPfannschmidt/pytest,pfctdayelise/pytest,ddboline/pytest,pytest-dev/pytest,alfredodeza/pytest,tomviner/pytest,hackebrot/pytest,Akasurde/pytest