fix(build): correct JSON schema target from draft-07 to draft-7

Fix invalid target warning in schema generation.
Schema regenerated with correct draft-7 target.

script/build-schema-document.ts

@@ -3,7 +3,7 @@ import { OhMyOpenCodeConfigSchema } from "../src/config/schema"
 
 export function createOhMyOpenCodeJsonSchema(): Record<string, unknown> {
   const jsonSchema = z.toJSONSchema(OhMyOpenCodeConfigSchema, {
-    target: "draft-07",
+    target: "draft-7",
     unrepresentable: "any",
   })