Fix: S3Config 환경변수 설정 변경

Author: mjttong

src/main/java/acc/hotsix/file_share/global/config/S3Config.java

@@ -14,10 +14,10 @@
 @Configuration
 public class S3Config {
 
-    @Value("${cloud.aws.credentials.access-key}")
+    @Value("${cloud.aws.credentials.accessKey}")
     private String accessKey;
 
-    @Value("${cloud.aws.credentials.secret-key}")
+    @Value("${cloud.aws.credentials.secretKey}")
     private String secretKey;
 
     @Value("${cloud.aws.region.static}")