Revert "Update dependency"

This reverts commit bd04047.

Author: Bryan Smit

composer.json

@@ -12,7 +12,7 @@
     "require": {
         "php": "^8.0",
         "composer/installers": "^1.0 || ^2.0",
-        "october/rain": "^3.0",
+        "october/system": "^3.0",
         "spatie/schema-org": "^3.11"
     },
     "minimum-stability": "stable",