Update dependency @11ty/eleventy-plugin-rss to v2 (#25)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [@11ty/eleventy-plugin-rss](https://www.11ty.dev/docs/plugins/rss/)
([source](https://togithub.com/11ty/eleventy-plugin-rss)) | [`^1.2.0` ->
`^2.0.0`](https://renovatebot.com/diffs/npm/@11ty%2feleventy-plugin-rss/1.2.0/2.0.0)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/@11ty%2feleventy-plugin-rss/2.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/@11ty%2feleventy-plugin-rss/2.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/@11ty%2feleventy-plugin-rss/1.2.0/2.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
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|

---

### Release Notes

<details>
<summary>11ty/eleventy-plugin-rss
(@&#8203;11ty/eleventy-plugin-rss)</summary>

###
[`v2.0.0`](https://togithub.com/11ty/eleventy-plugin-rss/compare/v1.2.0...v2.0.0)

[Compare
Source](https://togithub.com/11ty/eleventy-plugin-rss/compare/v1.2.0...v2.0.0)

</details>

---

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website/package.json

@@ -30,7 +30,7 @@
  },
  "devDependencies": {
  "@11ty/eleventy": "^2.0.1",
- "@11ty/eleventy-plugin-rss": "^1.2.0",
+ "@11ty/eleventy-plugin-rss": "^2.0.0",
  "@11ty/eleventy-plugin-syntaxhighlight": "^5.0.0",
  "@manustays/eleventy-plugin-generate-social-images": "^4.1.0",
  "cssnano": "^7.0.0",