Update alertmanager.yml

[lucklove]

What problem does this PR solve?

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release notes:

NONE

[codecov-commenter]

Codecov Report

Merging #1426 (81d6690) into master (80dacf5) will increase coverage by 28.83%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #1426       +/-   ##
===========================================
+ Coverage   25.38%   54.22%   +28.83%     
===========================================
  Files         266      291       +25     
  Lines       20642    22525     +1883     
===========================================
+ Hits         5240    12214     +6974     
+ Misses      14598     8383     -6215     
- Partials      804     1928     +1124     

Flag	Coverage Δ
cluster	41.97% <ø> (?)
dm	24.45% <ø> (?)
integrate	48.76% <ø> (+33.30%)	⬆️
playground	13.73% <ø> (?)
tiup	15.46% <ø> (ø)
unittest	21.73% <ø> (ø)

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

Impacted Files	Coverage Δ
components/playground/instance/tikv_config.go	100.00% <0.00%> (ø)
pkg/logger/logger.go	100.00% <0.00%> (ø)
pkg/cluster/operation/upgrade.go	57.27% <0.00%> (ø)
...onents/playground/instance/tiflash_proxy_config.go	81.81% <0.00%> (ø)
pkg/cluster/operation/destroy.go	57.28% <0.00%> (ø)
components/playground/instance/tidb.go	81.25% <0.00%> (ø)
components/playground/instance/process.go	81.39% <0.00%> (ø)
pkg/logger/debug.go	16.66% <0.00%> (ø)
components/playground/instance/tiflash.go	59.09% <0.00%> (ø)
components/playground/instance/pd.go	73.91% <0.00%> (ø)
... and 210 more

---

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[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• AstroProfundis

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[AstroProfundis]

/merge

[ti-chi-bot]

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

Commit hash: 81d6690