ci: ignore beats from dependabots update

[kruskall]

Motivation/summary

beats is using some special versioning and dependency bump is handled by updatecli.

Ignore beats from dependabotes update

Checklist

• Update CHANGELOG.asciidoc
• Documentation has been updated

For functional changes, consider:

• Is it observable through the addition of either logging or metrics?
• Is its use being published in telemetry to enable product improvement?
• Have system tests been added to avoid regression?

How to test these changes

Related issues

See #12539

[mergify]

This pull request does not have a backport label. Could you fix it @kruskall? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-7.17 is the label to automatically backport to the 7.17 branch.
• backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit.

NOTE: backport-skip has been added to this pull request.

[axw]

Ideally we'd just use Dependabot to update to the latest commit on the relevant branch, but it seems you can't do that: dependabot/dependabot-core#2028