fix: fix to scrape prometheus matrics

[vikranth-t]

What this PR does / why we need it:

Which issue this PR fixes

(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged)

• fixes #

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Checklist

• DCO signed
• Chart Version bumped
• Chart artifacthub.io/changes field updated (if exists)
• Title of the PR starts with chart name (e.g. [mlflow])
• Unit tests written
• values.yaml file fields documented
• README.md file updated

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