Update zeebe-io/backport-action action to v2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
zeebe-io/backport-action	action	major	v1.4.0 -> v2.0.0

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Release Notes

zeebe-io/backport-action (zeebe-io/backport-action)

v2.0.0: Backport-action v2.0.0

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What's Changed

Breaking change: Support for node16 has been dropped with this release. If you're using self-hosted runners, please ensure that node20 is available. We also recommend using actions/checkout@v4 alongside korthout/backport-action@v2.

• Update from node16 to node20 by @​korthout in https://github.com/korthout/backport-action/pull/392

Updated Dependencies

• build(deps): bump actions/checkout from 3 to 4 by @​dependabot in https://github.com/korthout/backport-action/pull/382
• build(deps): bump @​actions/core from 1.10.0 to 1.10.1 by @​dependabot in https://github.com/korthout/backport-action/pull/385
• build(deps): bump @​types/dedent from 0.7.0 to 0.7.1 by @​dependabot in https://github.com/korthout/backport-action/pull/388
• build(deps): bump @​actions/github from 5.1.1 to 6.0.0 by @​dependabot in https://github.com/korthout/backport-action/pull/387

Full Changelog: korthout/backport-action@v1.4.0...v2.0.0

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