scientific-python/pytest-doctestplus: v1.6.0

<!-- Release notes generated using configuration in .github/release.yml at v1.6.0 --> What's Changed TST: Catch ResourceWarning under bad combo by @pllim in https://github.com/scientific-python/pytest-doctestplus/pull/307 CI: move on from deprecated macos image by @bsipocz in https://github.com/scientific-python/pytest-doctestplus/pull/309 TST: Debug and fix new Windows + Python 3.14 failure (try 2) by @pllim in https://github.com/scientific-python/pytest-doctestplus/pull/310 BUG: Fix directives that do not have any content by @seberg in https://github.com/scientific-python/pytest-doctestplus/pull/311 Ensure skipped doctest are visible by @lagru in https://github.com/scientific-python/pytest-doctestplus/pull/312 New Contributors @lagru made their first contribution in https://github.com/scientific-python/pytest-doctestplus/pull/312 Full Changelog: https://github.com/scientific-python/pytest-doctestplus/compare/v1.5.0...v1.6.0