message: [vcpkg-update] Add .\ to update message.
diff: @@ -77,7 +77,7 @@ namespace vcpkg::Commands::Update
  {
  if (maj1 != maj2 || min1 != min2 || rev1 != rev2)
  {
  - System::println("Different source is available for vcpkg (%d.%d.%d -> %d.%d.%d). Use bootstrap-vcpkg.bat to update.",
  + System::println("Different source is available for vcpkg (%d.%d.%d -> %d.%d.%d). Use .\\bootstrap-vcpkg.bat to update.",
  maj2, min2, rev2,
  maj1, min1, rev1);
  }
  