fix typo in strdec-wcsdec-mbsdec-mbsdec-l.md (#4483)

fix typo in strdec-wcsdec-mbsdec-mbsdec-l.md

Author: peanutsjamjam

docs/c-runtime-library/reference/strdec-wcsdec-mbsdec-mbsdec-l.md

@@ -15,7 +15,7 @@ ms.assetid: ae37c223-800f-48a9-ae8e-38c8d20af2dd
 Moves a string pointer back one character.
 
 > [!IMPORTANT]
-> **`mbsdec`** and **`mbsdec_l`** cannot be used in applications that execute in the Windows Runtime. For more information, see [CRT functions not supported in Universal Windows Platform apps](../../cppcx/crt-functions-not-supported-in-universal-windows-platform-apps.md).
+> **`_mbsdec`** and **`_mbsdec_l`** cannot be used in applications that execute in the Windows Runtime. For more information, see [CRT functions not supported in Universal Windows Platform apps](../../cppcx/crt-functions-not-supported-in-universal-windows-platform-apps.md).
 
 ## Syntax