Bump @astrojs/rss from 4.0.18 to 4.0.19

Bumps [@astrojs/rss](https://github.com/withastro/astro/tree/HEAD/packages/astro-rss) from 4.0.18 to 4.0.19.
- [Release notes](https://github.com/withastro/astro/releases)
- [Changelog](https://github.com/withastro/astro/blob/main/packages/astro-rss/CHANGELOG.md)
- [Commits](https://github.com/withastro/astro/commits/@astrojs/rss@4.0.19/packages/astro-rss)

---
updated-dependencies:
- dependency-name: "@astrojs/rss"
  dependency-version: 4.0.19
  dependency-type: direct:development
...

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package.json

@@ -12,7 +12,7 @@
     "@astrojs/check": "^0.9.9",
     "@astrojs/markdown-remark": "^7.2.0",
     "@astrojs/mdx": "^7.0.0",
-    "@astrojs/rss": "^4.0.18",
+    "@astrojs/rss": "^4.0.19",
     "@astrojs/sitemap": "^3.7.3",
     "@astrojs/svelte": "^9.0.0",
     "@fontsource-variable/jost": "^5.2.8",