refine wording + winGRASS URL added

Co-authored-by: Veronica Andreo <veroandreo@gmail.com>

content/download/windows.en.md

@@ -45,7 +45,9 @@ Standalone installer: install GRASS GIS with the required support packages.
 #### <a name="GRASS-GIS-devel"></a> GRASS GIS 8.0
 
 <div class="alert rounded-0 alert-info">
-<i class="fa fa-info-circle"></i> Active <u>development</u> and <u>new stable</u> <b>GRASS GIS</b> version.
+<i class="fa fa-info-circle"></i> Active <u>development</u> and <u>upcoming new stable</u> <b>GRASS GIS</b> version.
+
+*  [<i class="fa fa-download"></i> Download RC1](https://grass.osgeo.org/grass80/binary/mswindows/native/WinGRASS-8.0.0RC1-1-Setup.exe)
 </div>
 
 *  Forthcoming in 2022!