docs: deprecation.rst: Add missing arguments to code example
docs: deprecation.rst: Add missing arguments to code example

In the proposed new style using `@pytest.mark.parametrize`,
the example function signature missed the actual arguments.
Add the missing arguments
tomviner/pytest,tomviner/pytest,txomon/pytest,alfredodeza/pytest,Akasurde/pytest,nicoddemus/pytest,davidszotten/pytest,pytest-dev/pytest,ddboline/pytest,RonnyPfannschmidt/pytest,The-Compiler/pytest,The-Compiler/pytest,markshao/pytest,nicoddemus/pytest,hackebrot/pytest,pfctdayelise/pytest