Update to 11ty 3.0

Author: himynameisjonas

package.json

@@ -24,7 +24,7 @@
     "node": ">=18.18.2"
   },
   "devDependencies": {
-    "@11ty/eleventy": "^2.0.1",
+    "@11ty/eleventy": "3.0.0-alpha.5",
     "@11ty/eleventy-img": "^3.1.8",
     "@11ty/eleventy-plugin-rss": "1.1.2",
     "@11ty/eleventy-plugin-syntaxhighlight": "4.0.0",