i18n(ko-KR): create cache-not-enabled.mdx (#13554)

Co-authored-by: Yan <61414485+yanthomasdev@users.noreply.github.com>

Author: jsparkdev

src/content/docs/ko/reference/errors/cache-not-enabled.mdx

@@ -0,0 +1,10 @@
+---
+title: Cache is not enabled.
+i18nReady: true
+githubURL: https://github.com/withastro/astro/blob/main/packages/astro/src/core/errors/errors-data.ts
+---
+
+> `Astro.cache` is not available because the cache feature is not enabled.
+
+## 무엇이 잘못되었나요?
+`Astro.cache` 또는 `context.cache`를 사용했지만, Astro 설정에서 캐시 기능이 활성화되지 않았을 때 발생합니다.