docs: Fix links to Prometheus Metrics Library
What does this MR do?
Update links to the obsolete Prometheus Metrics Library doc with the new URL introduced in !23233 (merged)
Related issues
Closes #55290 (closed)
Author's checklist
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Apply the correct labels and milestone -
Crosslink the document from the higher-level index -
Crosslink the document from other subject-related docs -
Feature moving tiers? Make sure the change is also reflected in features.yml
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Correctly apply the product badges and tiers -
Port the MR to EE (or backport from CE): always recommended, required when the ee-compat-check
job fails
Review checklist
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Your team's review (required) -
PM's review (recommended, but not a blocker) -
Technical writer's review (required) -
Merge the EE-MR first, CE-MR afterwards
Edited by Takuya Noguchi