fix docs error

[Hen1ng]

Make sure set the target branch to develop

What is the purpose of the change

fix docs spell error

Brief changelog

fix docs spell error

Verifying this change

XXXX

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• Make sure there is a Github issue filed for the change (usually before you start working on it). Trivial changes like typos do not require a Github issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
• Format the pull request title like [ISSUE #123] Fix UnknownException when host config not exist. Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test(over 80% coverage) to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add integration-test in test module.
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[codecov-commenter]

Codecov Report

Merging #4023 (245df4d) into develop (03c5a3d) will decrease coverage by 0.08%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop    #4023      +/-   ##
=============================================
- Coverage      47.95%   47.87%   -0.09%     
+ Complexity      5004     4994      -10     
=============================================
  Files            633      633              
  Lines          42520    42528       +8     
  Branches        5571     5573       +2     
=============================================
- Hits           20391    20360      -31     
- Misses         19633    19671      +38     
- Partials        2496     2497       +1     

Impacted Files	Coverage Δ
...rg/apache/rocketmq/common/stats/StatsSnapshot.java	84.61% <0.00%> (-15.39%)	⬇️
.../org/apache/rocketmq/store/PutMessageSpinLock.java	85.71% <0.00%> (-14.29%)	⬇️
.../apache/rocketmq/common/stats/MomentStatsItem.java	38.09% <0.00%> (-9.53%)	⬇️
...va/org/apache/rocketmq/store/FlushDiskWatcher.java	81.25% <0.00%> (-9.38%)	⬇️
...ache/rocketmq/common/stats/MomentStatsItemSet.java	39.13% <0.00%> (-8.70%)	⬇️
...va/org/apache/rocketmq/common/stats/StatsItem.java	50.00% <0.00%> (-5.00%)	⬇️
...org/apache/rocketmq/common/stats/StatsItemSet.java	43.28% <0.00%> (-2.99%)	⬇️
...ava/org/apache/rocketmq/filter/util/BitsArray.java	59.82% <0.00%> (-2.57%)	⬇️
.../rocketmq/broker/filter/ConsumerFilterManager.java	72.19% <0.00%> (-1.80%)	⬇️
...che/rocketmq/acl/plain/PlainPermissionManager.java	75.19% <0.00%> (-0.98%)	⬇️
... and 8 more

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[coveralls]

Coverage increased (+0.1%) to 51.907% when pulling 245df4d on Hen1ng:fix_doc_error into f57ea77 on apache:develop.

[Kvicii]

LGTM