headers: Add the new define _CRT_INTERNAL_PRINTF_STANDARD_ROUNDING

This was added in UCRT 10.0.19041.0.

Signed-off-by: Martin Storsjö <martin@martin.st>

mingw-w64-headers/crt/corecrt_stdio_config.h

diff --git a/mingw-w64-headers/crt/corecrt_stdio_config.h b/mingw-w64-headers/crt/corecrt_stdio_config.h
index 02a8368..6f48d49 100644
--- a/mingw-w64-headers/crt/corecrt_stdio_config.h
+++ b/mingw-w64-headers/crt/corecrt_stdio_config.h
@@ -14,6 +14,7 @@
 #define _CRT_INTERNAL_PRINTF_LEGACY_WIDE_SPECIFIERS            0x0004ULL
 #define _CRT_INTERNAL_PRINTF_LEGACY_MSVCRT_COMPATIBILITY       0x0008ULL
 #define _CRT_INTERNAL_PRINTF_LEGACY_THREE_DIGIT_EXPONENTS      0x0010ULL
+#define _CRT_INTERNAL_PRINTF_STANDARD_ROUNDING                 0x0020ULL
 
 #define _CRT_INTERNAL_SCANF_SECURECRT                    0x0001ULL
 #define _CRT_INTERNAL_SCANF_LEGACY_WIDE_SPECIFIERS       0x0002ULL