[metrics-bugs] #21578 [Metrics/Metrics website]: Resolve deprecation warnings after upgrading to metrics-lib 1.6.0

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#21578: Resolve deprecation warnings after upgrading to metrics-lib 1.6.0
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 Reporter:  karsten                  |          Owner:  metrics-team
     Type:  defect                   |         Status:  closed
 Priority:  Medium                   |      Milestone:
Component:  Metrics/Metrics website  |        Version:
 Severity:  Normal                   |     Resolution:  fixed
 Keywords:                           |  Actual Points:
Parent ID:                           |         Points:
 Reviewer:                           |        Sponsor:
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Changes (by karsten):

 * status:  merge_ready => closed
 * resolution:   => fixed


Comment:

 Cherry-picked and pushed to master.  Thanks for looking!  Closing.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21578#comment:3>
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