remove stable-v1.0 channel from 1.1 release

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alebedev87

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/openshift/external-dns-operator/blob/main/OWNERS)~~ [alebedev87] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[alebedev87]

/label docs-approved /label px-approved

No docs impact.

[openshift-ci[bot]]

@alebedev87: all tests passed!

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[Miciah]

/lgtm

[lihongan]

/label qe-approved