Merge pull request #50 from htmlhint/dependabot/npm_and_yarn/astro-5.15.9

Bump astro from 5.15.6 to 5.15.9

Author: coliff

package-lock.json

@@ -31,7 +31,7 @@
   },
   "dependencies": {
     "ace-builds": "^1.43.4",
-    "astro": "^5.15.6",
+    "astro": "^5.15.9",
     "bootstrap": "^5.3.8",
     "htmlhint": "^1.7.1"
   },