WiX: update logo icon for Windows

Update the icon to contain the various sized icons that we would like to
use.  This was generated by converting `Swift_logo_color.svg` into
various fixed sized PNGs and then collecting them into the icon via:

```cmd
FOR %G IN (16,20,24,30,32,36,40,48,60,64,72,80,96,128,256) DO (magick convert -background none -resize %Gx%G Swift_logo_color.svg logo@%G.png)
magick convert logo@16.png logo@20.png logo@24.png logo@30.png logo@32.png logo@36.png logo@40.png logo@48.png logo@60.png logo@64.png logo@72.png logo@80.png logo@96.png logo@128.png logo@256.png logo.ico
```

Author: compnerd

platforms/Windows/bundle/installer.wxs

@@ -2,7 +2,7 @@
   <Bundle
     Name="!(loc.BundleName) $(ProductVersion)"
     Version="$(ProductVersion)"
-    IconSourceFile="logo@256.ico"
+    IconSourceFile="logo.ico"
     Manufacturer="!(loc.ManufacturerName)"
     DisableModify="yes"
     Compressed="$(IsBundleCompressed)"