Codecov action failing to upload for master due to a missing token

The current Codecov automation is referencing a base commit which is out of date and this appears to be because the upload action fails when running on master due to a missing token. This can be fixed by adding a Codecov token but it also looks like it can be fixed directly in the action by enabling GitHub native OIDC tokens. I'll open a PR to include the OIDC token.