Missing major version tags to support action use

[stevenh]

It's idiomatic to create major version tags so users can use them in their actions reducing code churn to get the latest compatible version e.g.
bufbuild/buf-lint-action@v1

Could you add the creation of:

• v<major>

You can see this in practice actions/checkout.

[emcfarlane]

@stevenh please take a look at the new buf-action which does support major version tags.