Set up automatic release management into major release numbers

**Is your feature request related to a problem? Please describe.**
GitHub Actions are used in workflows by major version number only (e.g. actions/checkout@v3). We release here with a three-component semantic versioning number. This requires that we do the following upon a new release: delete the major version tag, create the new release, create a new major version tag. This is cumbersome and error-prone.

**Describe the solution you'd like**
One of the many GitHub Actions that facilitates this process would be useful here, e.g. https://github.com/marketplace/actions/build-and-tag. Many others are available

**Describe alternatives you've considered**
We can also just be clearer about the procedure we follow and make sure we keep doing that correctly.