Update README.md

Author: fumihax

README.md

@@ -6,7 +6,7 @@ C++ Static Library for VC++
 git clone https://github.com/JunkBox-Library/JunkBox_Libpp.git JubkBox_Lib++
 ```
 
-## Needed External Tool/SDK
+## Needed External Tool
 ### Visual Studio Comminity (C++, MFC)
 * MFC is needed for **JunkBox_Win_Lib** later.
    * https://visualstudio.microsoft.com/en-us/vs/community/