Resolve typo in hypershift_cluster_waiting_initial_availability_duration_seconds

[joshbranham]

What type of PR is this?

bug

What this PR does / why we need it?

Fix typo in metric that is being resolved in openshift/hypershift#7730

Which Jira/Github issue(s) this PR fixes?

Fixes #

Special notes for your reviewer:

Pre-checks (if applicable):

• Tested latest changes against a cluster

• Included documentation changes with PR

• If this is a new object that is not intended for the FedRAMP environment (if unsure, please reach out to team FedRAMP), please exclude it with:

  matchExpressions:
  - key: api.openshift.com/fedramp
    operator: NotIn
    values: ["true"]

[joshbranham]

/hold

Hold until the HO change is released

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: joshbranham
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[openshift-ci]

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