chore: Enable dependabot for automatic dependency updates

[blkperl]

Signed-off-by: William Van Hevelingen [email protected]

Don't bother creating a PR until you've done this:

• Run make pre-commit -B to fix codegen, lint, and commit message problems.

Create your PR as a draft.

• Your PR needs to pass the required checks before it can be approved. If the check is not required (e.g. E2E tests) it
  does not need to pass.
• Once required tests have passed, you can make it "Ready for review".
• Say how how you tested your changes. If you changed the UI, attach screenshots.

Tips:

• If changes were requested, and you've made them, then dismiss the review to get it looked at again.
• Add you organization to USERS.md if you like.
• You can ask for help!

[terrytangyuan]

@blkperl The dependabot starts to spam people's forks if they have synced with the latest upstream. Is there a way to disable that automatically without having to disable manually in each of the forks? Examples:

• chore(deps): bump golangci/golangci-lint-action from 2 to 3 terrytangyuan/argo-workflows#3
• chore(deps): bump github.com/argoproj/argo-events from 1.5.0 to 1.6.0 terrytangyuan/argo-workflows#2
• https://github.com/yriveiro/argo-workflows/pulls

[terrytangyuan]

Looks like it's an open issue: dependabot/dependabot-core#2804