chore: Bump prometheus/common library

[mrueg]

What this PR does / why we need it:
In later releases of prometheus/common FormatStrings got unexported to allow to check for more permutations with other features encoded in the contentType.
prometheus/common#576

How does this change affect the cardinality of KSM: (increases, decreases or does not change cardinality)
None
Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

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[knabben]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: knabben, mrueg

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[mrueg]

/lgtm

@knabben
I noticed that you haven't been involved in this project, so this lgtm feels very drive-by-ish.
Would you like to become more involved with the project?

[knabben]

@mrueg It was for a specific case; I apologize if you were expecting other assigned reviewers.

I'm not sure if I have the bandwidth to collaborate on the project actively.

[mrueg]

@knabben Yes, the expectation in general is that contributors would lgtm pull requests and not unrelated members of the kubernetes org (and if they do it, then they would usually provide some context why).

Was there any specific bug or issue that you saw that this PR fixes?

[shuguet]

Sorry folks, I reached out on the CNCF Ambassador channel to ask if there was any maintainer of this project present who could approved this, as our (internal) project includes some modules from this repo, and we were blocked (importing 2 modules of different versions, the usual).

I did not mean to cause any issue here 🙏

Thank you for merging this though!