Temporarily downgrade Altcha to fix spam requests

Author: tobihagemann

package-lock.json

@@ -25,7 +25,7 @@
   "dependencies": {
     "@awesome.me/kit-628503cc21": "^1.0.18",
     "alpinejs": "^3.14.9",
-    "altcha": "^2.1.0",
+    "altcha": "^1.5.1",
     "jquery": "^3.7.1",
     "js-yaml": "^4.1.0",
     "lazysizes": "^5.3.2",