build/windows: Comment .ps1 scripts regarding 'gimp-release'

build/windows/installer/3_dist-gimp-inno.ps1

@@ -148,7 +148,7 @@ fix_msg $INNO_PATH\Languages\Unofficial
 
 # 4. PREPARE GIMP FILES
 
-## GIMP revision on about dialog
+## GIMP revision on about dialog (this does the same as '-Drevision' build option)
 ## FIXME: This should be done with Inno scripting
 if ($GITLAB_CI)
   {

build/windows/store/3_dist-gimp-winsdk.ps1

@@ -208,7 +208,7 @@ foreach ($bundle in $supported_archs)
         ## Copy files into VFS folder (to support external 3P plug-ins)
         Copy-Item "$bundle" "$vfs" -Recurse -Force
 
-        ## Set revision (on GIMP about dialog)
+        ## Set revision on about dialog (this does the same as '-Drevision' build option)
         (Get-Content "$vfs\share\gimp\*\gimp-release") | Foreach-Object {$_ -replace "revision=0","revision=$revision"} |
         Set-Content "$vfs\share\gimp\*\gimp-release"