Update platformdirs requirement from ~=4.11.13 to ~=4.12.4

[dependabot]

Updates the requirements on platformdirs to permit the latest version.

Release notes

Sourced from platformdirs's releases.

4.12.4

What's Changed

• ci: download coverage during tool setup by @​gaborbernat in tox-dev/platformdirs#609
• 🐛 fix(api): keep root's site dir readable in place_*_file by @​darrenhuai in tox-dev/platformdirs#610
• fix: fall back from unreachable runtime directory with ensure_exists by @​harbinresearcher in tox-dev/platformdirs#611

New Contributors

• @​harbinresearcher made their first contribution in tox-dev/platformdirs#611

Full Changelog: tox-dev/platformdirs@4.12.3...4.12.4

Changelog

Sourced from platformdirs's changelog.

########### Changelog ###########

.. towncrier-draft-entries:: Unreleased

.. towncrier release notes start

---

4.13.0 (2026-10-10)

---

• Detect Homebrew Python for the :class:~platformdirs.macos.MacOS site directories under :option:python:-S, which leaves :data:sys.base_prefix on the Cellar keg, and for the python-freethreading formula - by :user:sricharanreddycheruku. :pr:612
• Use Python 3.15 for development and automation. :pr:613

---

4.12.4 (2026-10-07)

---

• Keep site directories readable by other users when root calls :meth:~platformdirs.api.PlatformDirsABC.place_config_file or another place_*_file method with :attr:~platformdirs.api.PlatformDirsABC.use_site_for_root - by :user:darrenhuai. :pr:610
• Make :func:~platformdirs.user_runtime_dir warn and fall back from an unreachable XDG_RUNTIME_DIR under :attr:~platformdirs.api.PlatformDirsABC.ensure_exists instead of raising. :pr:611

---

4.12.3 (2026-10-03)

---

• Place files from place_config_file and place_data_file in the first site directory for root on Unix with use_site_for_root=True and multipath=True, where find_config_file and find_data_file look for them. :pr:607

---

4.12.2 (2026-09-29)

---

• Keep os.pathsep in site_applications_path under multipath=True on platforms with one applications directory. :pr:604

---

4.12.1 (2026-09-28)

---

• Avoid PytestAssertRewriteWarning when importing platformdirs before invoking pytest. :pr:601

---

4.12.0 (2026-09-26)

... (truncated)

Commits

• 19338a4 Release 4.12.4
• f2a4fa9 fix: fall back from unreachable runtime directory with ensure_exists (#611)
• 16429e2 🐛 fix(api): keep root's site dir readable in place_*_file (#610)
• b9735d3 ci: download coverage during tool setup (#609)
• 344f249 [pre-commit.ci] pre-commit autoupdate (#608)
• 960ff63 Release 4.12.3
• 8047ad5 Place root config and data files in the first site directory (#607)
• af2fc7f Release 4.12.2
• bdafa67 ♻️ refactor(api): share use_site iteration (#606)
• d5ff75c 🐛 fix(api): keep os.pathsep in site_applications_path (#604)
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.