fix(OCS dashboard): s/namesapce/namespace/ prometheus query typos

[tumido]

Digging through the OCS queries I've noticed a typo here - namesapce is a nonsense. Neither of those queries has such label. I think this should have been a namespace which is a valid label. On the other hand I'm not sure how much is this on() property here even relevant or important, because the queries were left like this for long long time.

[openshift-ci-robot]

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Hi @tumido. Thanks for your PR.

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[spadgett]

/ok-to-test
/cc @cloudbehl @bipuladh

[afreen23]

@anmolsachan PTAL
I think we recently updated some of them as the bug fix.
Thanks

[afreen23]

/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: afreen23, anmolsachan, tumido

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