Dependabot - submodules - update only tagged commits

I’ve enabled Dependabot to update my submodules, which is great - but I also have vcpkg as a submodule (as recommended by vcpkg) and that gets a lot of updates.

Is it possible to have vcpkg only update on tagged commit (ie releases)? Or have a custom update schedule for this submodule?

I’ve looked through the options but did not find a relevant one.