Update dependency mkdocs-rss-plugin to v1.13.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mkdocs-rss-plugin	==1.13.0 -> ==1.13.1

---

Release Notes

Guts/mkdocs-rss-plugin (mkdocs-rss-plugin)

### [`v1.13.1`](https://togithub.com/Guts/mkdocs-rss-plugin/blob/HEAD/CHANGELOG.md#1131---2024-06-15) [Compare Source](https://togithub.com/Guts/mkdocs-rss-plugin/compare/1.13.0...1.13.1) ##### Bugs fixes 🐛 - Fix remote image length warnings using requests instead of urllib (standard lib) by [@​Guts](https://togithub.com/Guts) in [#​289](https://togithub.com/Guts/mkdocs-rss-plugin/pull/289) ##### Features and enhancements 🎉 - refacto(cleanup): remove python 3.9 related code and deps (timezone) by [@​Guts](https://togithub.com/Guts) in [#​288](https://togithub.com/Guts/mkdocs-rss-plugin/pull/288) - improve(logs): enhance some logs and type hints by [@​Guts](https://togithub.com/Guts) in [#​293](https://togithub.com/Guts/mkdocs-rss-plugin/pull/293) - Feature: improve social cards integration by [@​Guts](https://togithub.com/Guts) in [#​294](https://togithub.com/Guts/mkdocs-rss-plugin/pull/294)

---

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.