Update template to Astro 5.0, use Content Collections

src/layouts/BlogPost.astro

@@ -1,4 +1,5 @@
 ---
+import { getCollection } from "astro:content";
 import BaseHead from "../components/BaseHead.astro";
 import Header from "../components/Header.astro";
 import Footer from "../components/Footer.astro";
@@ -6,7 +7,7 @@ import ColorScript from "../components/ColorScript.astro";
 import Tags from "../components/Tags.astro";
 import getTags from "../scripts/getTags";
 
-const posts = await Astro.glob("../posts/*.md");
+const posts = await getCollection("posts");
 const allTags = getTags(posts);
 
 let {