Add 'github-actions' config to dependabot

[sebrandon1]

Automatically update github actions versions via dependabot.

https://docs.github.com/en/code-security/dependabot/working-with-dependabot/keeping-your-actions-up-to-date-with-dependabot

Similar to:

• Add dependabot config for github actions test-network-function/cnf-certification-test#954
• Add Hadolint, a Dockerfile linter test-network-function/cnf-certification-test#936

[openshift-ci]

Hi @sebrandon1. Thanks for your PR.

I'm waiting for a redhat-openshift-ecosystem member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[dcibot]

• SUCCESS https://www.distributed-ci.io/jobs/eda78c89-226d-491d-84da-d5967be2cf5f/jobStates
  from Add 'github-actions' config to dependabot #1013

[dcibot]

• SUCCESS https://www.distributed-ci.io/jobs/ed615bc6-580d-4351-88f6-b6f0896834b5/jobStates
  from Add 'github-actions' config to dependabot #1013

[bcrochet]

/lgtm

[bcrochet]

/ok-to-test

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: acornett21, bcrochet, sebrandon1

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• OWNERS [acornett21,bcrochet]

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