Update documentation for dependabot version updates in monorepos

[dsotirakis]

Code of Conduct

• I have read and agree to the GitHub Docs project's Code of Conduct

What article on docs.github.com is affected?

https://docs.github.com/en/code-security/dependabot/ecosystems-supported-by-dependabot/supported-ecosystems-and-repositories

What part(s) of the article would you like to see updated?

I would like to see information about the best tag patterns for GitHub Actions, so dependabot can flawlessly update dependencies in a monorepo with multiple actions.

Additional information

No response

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