fix: 학습 스터디 상수 접근제한자 설정 변경

study/src/main/java/cache/com/example/version/CacheBustingWebConfig.java

@@ -8,7 +8,7 @@
 @Configuration
 public class CacheBustingWebConfig implements WebMvcConfigurer {
 
-    private static final String PREFIX_STATIC_RESOURCES = "/resources";
+    public static final String PREFIX_STATIC_RESOURCES = "/resources";
 
     private final ResourceVersion version;