Add .github/dependabot.yml to repository

[docktermj]

Add ./github/dependabot.yml files to repositories to add additional dependency checks.

To get started with Dependabot version updates, you'll need to specify which package ecosystems to update and where the package manifests are located. Please see the documentation for all configuration options: https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates

Example with Docker and Python: https://github.com/Senzing/template-python/blob/main/.github/dependabot.yml