Update versions in anticipation of //BUILD.

Author: PhilLee-MSFT

docs/install/using-visual-studio-vm.md

@@ -28,9 +28,9 @@ Images for the most recent major versions, Visual Studio 2017 and Visual Studio
 
 | Release version                                              | Editions                     |     Product version     |
 |:------------------------------------------------------------:|:----------------------------:|:-----------------------:|
-| Visual Studio 2017: Latest (Version 15.6)                    |    Enterprise, Community     |      Version 15.6.4     |
-| Visual Studio 2017: Latest Preview (Version 15.7, Preview 3) |    Enterprise, Community     |      Version 15.7.0     |
-|         Visual Studio 2017: RTW                              |    Enterprise, Community     |      Version 15.0.10    |
+| Visual Studio 2017: Latest (Version 15.7)                    |    Enterprise, Community     |      Version 15.7.0     |
+| Visual Studio 2017: Latest Preview (Version 15.8, Preview 1) |    Enterprise, Community     |      Version 15.8.1     |
+|         Visual Studio 2017: RTW                              |    Enterprise, Community     |      Version 15.0.13    |
 |   Visual Studio 2015: Latest (Update 3)                      |    Enterprise, Community     |  Version 14.0.25431.01  |
 |         Visual Studio 2015: RTW                              |             None             | (Expired for servicing) |