chore(deps): update dependency mkdocs-material to v9.5.15

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mkdocs-material	9.5.14 -> 9.5.15

---

Release Notes

squidfunk/mkdocs-material (mkdocs-material)

### [`v9.5.15`](https://togithub.com/squidfunk/mkdocs-material/releases/tag/9.5.15): mkdocs-material-9.5.15 [Compare Source](https://togithub.com/squidfunk/mkdocs-material/compare/9.5.14...9.5.15) - Reverted fix for transparent iframes (9.5.14) - Fixed [#​6929](https://togithub.com/squidfunk/mkdocs-material/issues/6929): Interference of social plugin and auto dark mode - Fixed [#​6938](https://togithub.com/squidfunk/mkdocs-material/issues/6938): Giscus shows dark background in light mode (9.5.14 regression)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.