Update docs/msbuild/errors/msb3091.md

Co-authored-by: Rainer Sigwald <[email protected]>

Author: ghogen

docs/msbuild/errors/msb3091.md

@@ -37,7 +37,7 @@ This article describes the MSB3091 error code.
 -->
 ## Description
 
-This error occurs when a task failed, because it depends on the Windows SDK, which was not found or not installed.
+This error occurs when a task failed because it depends on the Windows SDK, which was not found or not installed.
 
 ## Resolution