Merge pull request #13702 from BenSeverson/patch-1

quick doc fix for windows versions

docs/sources/installation/windows.md

@@ -4,7 +4,7 @@ page_keywords: Docker, Docker documentation, Windows, requirements, virtualbox,
 
 # Windows
 > **Note:**
-> Docker has been tested on Windows 7.1 and 8; it may also run on older versions.
+> Docker has been tested on Windows 7 and 8.1; it may also run on older versions.
 > Your processor needs to support hardware virtualization.
 
 The Docker Engine uses Linux-specific kernel features, so to run it on Windows