Bump flannel CNI version to v1.4.1-flannel1

[github-actions]

Update flannel CNI binary version

Bump to latest flannel CNI version in Dockerfile

changed lines [21] of file "/tmp/updatecli/github/rancher/image-build-cni-plugins/Dockerfile"

v1.4.1-flannel1

Release published on the 2024-04-17 05:32:16 +0000 UTC at the url https://github.com/flannel-io/cni-plugin/releases/tag/v1.4.1-flannel1

## What's Changed
* Create dependabot.yml by @thomasferrandiz in https://github.com/flannel-io/cni-plugin/pull/62
* Bump github.com/containerd/containerd from 1.6.23 to 1.6.26 by @dependabot in https://github.com/flannel-io/cni-plugin/pull/63
* Bump alpine from 20230901 to 20231219 by @dependabot in https://github.com/flannel-io/cni-plugin/pull/64
* Bump github.com/onsi/gomega from 1.30.0 to 1.31.1 by @dependabot in https://github.com/flannel-io/cni-plugin/pull/65
* Bump google.golang.org/protobuf from 1.31.0 to 1.33.0 by @dependabot in https://github.com/flannel-io/cni-plugin/pull/68
* Bump github.com/onsi/gomega from 1.31.1 to 1.32.0 by @dependabot in https://github.com/flannel-io/cni-plugin/pull/71
* Bump alpine from 20231219 to 20240329 by @dependabot in https://github.com/flannel-io/cni-plugin/pull/73
* Bump Go, plugins and ginkgo version by @manuelbuil in https://github.com/flannel-io/cni-plugin/pull/74

## New Contributors
* @dependabot made their first contribution in https://github.com/flannel-io/cni-plugin/pull/63

**Full Changelog**: https://github.com/flannel-io/cni-plugin/compare/v1.4.0-flannel1...v1.4.1-flannel1

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