election: fix the keep alive worker (#6925)

[ti-chi-bot]

This is an automated cherry-pick of #6925

What problem does this PR solve?

Issue Number: Close #6926.

What is changed and how does it work?

Check List

Tests

• Unit test

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lhy1024
• nolouch

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[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.08% ⚠️

Comparison is base (df147b3) 75.67% compared to head (d483532) 75.60%.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-6.5    #6940      +/-   ##
===============================================
- Coverage        75.67%   75.60%   -0.08%     
===============================================
  Files              328      328              
  Lines            33197    33199       +2     
===============================================
- Hits             25123    25101      -22     
- Misses            5927     5942      +15     
- Partials          2147     2156       +9     

Flag	Coverage Δ
unittests	75.60% <0.00%> (-0.08%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
server/election/lease.go	82.19% <0.00%> (-5.14%)	⬇️

... and 28 files with indirect coverage changes

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[nolouch]

/merge

[ti-chi-bot]

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: ae9275e

[ti-chi-bot]

@ti-chi-bot: Your PR was out of date, I have automatically updated it for you.

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