Use ReScript v12 stable

Author: nojaf

package-lock.json

@@ -40,7 +40,7 @@
     "provenance": true
   },
   "peerDependencies": {
-    "rescript": ">=12.0.0-rc.0 <13"
+    "rescript": ">=12.0.0 <13"
   },
   "devDependencies": {
     "@astrojs/starlight": "0.36.2",
@@ -49,6 +49,6 @@
     "prettier": "^3.3.3",
     "prettier-plugin-astro": "^0.14.1",
     "sharp": "^0.34.0",
-    "rescript": ">=12.0.0-rc.0 <13"
+    "rescript": ">=12.0.0 <13"
   }
 }