[Feature]: Add dependeabot to update actions

### How will this affect the next version number?

New feature (increment MINOR version)

### Is your feature request related to a problem?

We just added a capability to update pre-commit dependencies. The equivalent for Actions is much easier -- enable dependabot:
https://docs.github.com/en/code-security/how-tos/secure-your-supply-chain/secure-your-dependencies/auto-update-actions

### Describe the solution you'd like

_No response_

### Describe alternatives you've considered

_No response_

### Additional context

_No response_

Start with the repository’s GitHub Actions configuration and the linked GitHub Dependabot documentation. Enable Dependabot updates for Actions, then verify that the configuration is valid and covers the repository’s existing workflows.

Written by the indexing model from the issue text.