AK: Fix typo in warnln_if()

Author: https://github.com/AtkinsSJ
Commit: dfc02f9761
Pull-request: https://github.com/SerenityOS/serenity/pull/13137
Reviewed-by: https://github.com/bgianfo ✅

AK/Format.h

@@ -575,10 +575,10 @@ void warnln(CheckedFormatString<Parameters...>&& fmtstr, const Parameters&... pa
 
 inline void warnln() { outln(stderr); }
 
-#    define warnln_if(flag, fmt, ...)      \
+#    define warnln_if(flag, fmt, ...)       \
-        do {                               \
+        do {                                \
-            if constexpr (flag)            \
+            if constexpr (flag)             \
-                outln(fmt, ##__VA_ARGS__); \
+                warnln(fmt, ##__VA_ARGS__); \
         } while (0)
 
 #endif