OBSDOCS-883: change docs to correct retention time uwm prometheus

[marioferh]

Documentation for User Workload Monitoring implies that default retention time is 15d, when it is actually 24h in practice

[openshift-ci-robot]

@marioferh: This pull request references OBSDOCS-883 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the bug to target the "4.16.0" version, but no target version was set.

In response to this:

Documentation for User Workload Monitoring implies that default retention time is 15d, when it is actually 24h in practice

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[machine424]

nit: I think to be future proof, it's better to explicitly set it to 24h as we do for the the platform one

cluster-monitoring-operator/pkg/manifests/config.go

Line 38 in b60f0b6

DefaultRetentionValue = "15d"

In case we miss the change of the default value in prometheus-operator.

/lgtm
/hold
unhold when you want.

[slashpai]

/lgtm

[marioferh]

/retest-required

[danielmellado]

/lgtm

[danielmellado]

/assign @bburt-rh

[danielmellado]

/retest-required

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: danielmellado, machine424, marioferh, slashpai

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[bburt-rh]

/label docs-approved

[danielmellado]

@marioferh mind checking @machine424 comment about the hold? I'd like to see if we get this in soon.

[machine424]

Tell me @marioferh if you want me to take over, Eliska already tried to address this here #2332

[simonpasquier]

/hold cancel

[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD f47dac6 and 2 for PR HEAD dc897bc in total

[openshift-ci]

@marioferh: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/versions	dc897bc	link	false	/test versions

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[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD a83f250 and 1 for PR HEAD dc897bc in total

[openshift-bot]

[ART PR BUILD NOTIFIER]

This PR has been included in build cluster-monitoring-operator-container-v4.17.0-202406052200.p0.g54e469b.assembly.stream.el9 for distgit cluster-monitoring-operator.
All builds following this will include this PR.