Description of changes:
This change updates go.mod for Go 1.21 support. This is needed to consume the github.com/containernetworking/plugins v1.4.1 dependency updates.
By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.
Issue #, if available: Unblocks #71
Description of changes: This change updates go.mod for Go 1.21 support. This is needed to consume the github.com/containernetworking/plugins v1.4.1 dependency updates.
By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.