update opencode.jsonc

.opencode/opencode.jsonc

@@ -2,9 +2,7 @@
   "$schema": "https://opencode.ai/config.json",
   "provider": {},
   "permission": {},
-  // TODO: flip back to `references` once a release containing the v1 `reference` migration ships.
-  // The release pipeline runs the latest published opencode against this file, which only knows `reference`.
-  "reference": {
+  "references": {
     "effect": {
       "repository": "github.com/Effect-TS/effect-smol",
       "description": "Use for Effect v4 and effect-smol implementation details",