fix: fix name validation regexp

[sbouchet]

What is the purpose of this change? What does it change?

Was the change discussed in an issue?

fixes #869

How to test changes?

[sbouchet]

actually, when using kubectl, it shows you the current regexp to use:

kubectl create namespace MY-namespace
The Namespace "MY-namespace" is invalid: metadata.name: Invalid value: "MY-namespace": a lowercase RFC 1123 label must consist of lower case alphanumeric characters or '-', and must start and end with an alphanumeric character (e.g. 'my-name',  or '123-abc', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?')

[sonarqubecloud[bot]]

Quality Gate passed

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[sbouchet]

/override ci/prow/e2e-openshift

[openshift-ci[bot]]

@sbouchet: Overrode contexts on behalf of sbouchet: ci/prow/e2e-openshift

In response to this:

/override ci/prow/e2e-openshift

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[adietish]

@sbouchet: build fails with missing intellij-common 1.9.6-SNAPSHOT. I thus bumped it to the final dependency: #911

[openshift-ci[bot]]

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This pull-request has been approved by: adietish

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[openshift-ci[bot]]

New changes are detected. LGTM label has been removed.

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[adietish]

/override ci/prow/e2e-openshift

[openshift-ci[bot]]

@adietish: Overrode contexts on behalf of adietish: ci/prow/e2e-openshift

In response to this:

/override ci/prow/e2e-openshift

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.