Fix typo in keyspace config

[wwu]

Correct "keyspaces" to "keyspace" as referred in code: https://github.com/tikv/pd/blob/4a7bffcb3baf7a8e2515e70834d8567bc17439da/server/config/config.go#L166C1-L167C1

What problem does this PR solve?

Issue Number: Ref #4399

What is changed and how does it work?

Check List

Tests

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

Code changes

• Has the configuration change
• Has HTTP API interfaces changed (Don't forget to add the declarative for the new API)
• Has persistent data change

Side effects

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

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• PR to update pingcap/tiup:
• Need to cherry-pick to the release branch

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lhy1024
• rleungx

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[ti-chi-bot]

Hi @wwu. Thanks for your PR.

I'm waiting for a tikv member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[rleungx]

/ok-to-test

[rleungx]

Please sign DCO.

[nolouch]

/merge

[ti-chi-bot]

@nolouch: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

You only need to trigger /merge once, and if the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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[rleungx]

/merge cancel

[codecov]

Codecov Report

Merging #8109 (8d5b13b) into master (141186e) will decrease coverage by 0.09%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8109      +/-   ##
==========================================
- Coverage   77.40%   77.31%   -0.09%     
==========================================
  Files         471      471              
  Lines       61240    61240              
==========================================
- Hits        47402    47348      -54     
- Misses      10277    10317      +40     
- Partials     3561     3575      +14     

Flag	Coverage Δ
unittests	77.31% <ø> (-0.09%)	⬇️

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

[nolouch]

/merge

[ti-chi-bot]

@nolouch: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

You only need to trigger /merge once, and if the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

If you have any questions about the PR merge process, please refer to pr process.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[ti-chi-bot]

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

Commit hash: 8d5b13b