hotfix: 댓글 조회 허용 엔드포인트 추가

Signed-off-by: yurim0628 <[email protected]>

src/main/java/com/example/sabujak/security/constants/SecurityConstants.java

@@ -44,6 +44,7 @@ public class SecurityConstants {
 
     public static final String[] PERMIT_ALL_GET_ENDPOINTS = {
             "/posts",
-            "/posts/{postId}"
+            "/posts/{postId}",
+            "/posts/{postId}/comments"
     };
 }