chore: update Go module dependencies to latest versions

[fsul7o]

Description

update Go module dependencies to latest versions

and

Fix TestDescribe failure caused by prometheus/client_golang upgrade

TestDescribe in service/metrics_test.go started failing after prometheus/client_golang was bumped to v1.24.1 in the recent dependency update. That version added a unit field to prometheus.Desc, so Desc.String() now renders as:

Desc{fqName: "...", help: "...", unit: "", constLabels: {}, variableLabels: {}}

The test's expected strings for cached_principal_bytes and cached_principal_entries were written against the old format (without unit: "") and no longer matched.

This is a test-only change — no production behavior is affected. NewDesc() is called without any DescOpt, so unit stays an empty string internally and is never appended to the metric name; the actual /metrics exposition output for cached_principal_bytes / cached_principal_entries is unchanged.

Type of change

• Bug fix
• New feature
• Refactoring (no functional changes, no api changes)
• Non-code changes (update documentation, pipeline, etc.)

Flags

• Breaks backward compatibility
• Requires a documentation update
• Has untestable code

Related issue/PR

Delete this section if there are no issues or pull requests that relate to this pull request.

• Fixes #issue
• Closes #PR

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Checklist

• Followed the guidelines in the CONTRIBUTING document
• Added prefix [skip ci]/[ci skip]/[no ci]/[skip actions]/[actions skip] in the PR title if necessary
• Tested and linted the code
• Commented the code
• Made corresponding changes to the documentation
• Passed all pipeline checking

Checklist for maintainer

• Use Squash and merge
• Double-confirm the merge message has prefix [skip ci]/[ci skip]/[no ci]/[skip actions]/[actions skip]
• Delete the branch after merge

[t4niwa]

TODO

Suggested change

	github.com/AthenZ/athenz-authorizer/v5 => github.com/AthenZ/athenz-authorizer/v5 v5.8.5-0.20260917024127-31c36c01e6a8
	github.com/AthenZ/athenz-authorizer/v5 => github.com/AthenZ/athenz-authorizer/v5 v5.8.5