[fix][doc] fix doc comment for subscriptionType

[chenhongSZ]

Fixes #xyz

Main Issue: #xyz

PIP: #xyz

Motivation

add Key_Shared comment for subscriptionType

Modifications

Verifying this change

• Make sure that the change passes the CI checks.

(Please pick either of the following options)

This change is a trivial rework / code cleanup without any test coverage.

(or)

This change is already covered by existing tests, such as (please describe tests).

(or)

This change added tests and can be verified as follows:

(example:)

• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Does this pull request potentially affect one of the following parts:

If the box was checked, please highlight the changes

• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
• The metrics
• Anything that affects deployment

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

Matching PR in forked repository

PR in forked repository:

[github-actions]

@chenhongSZ Please add the following content to your PR description and select a checkbox:

- [ ] `doc` <!-- Your PR contains doc changes -->
- [ ] `doc-required` <!-- Your PR changes impact docs and you will update later -->
- [ ] `doc-not-needed` <!-- Your PR changes do not impact docs -->
- [ ] `doc-complete` <!-- Docs have been already added -->

[chenhongSZ]

/pulsarbot run-failure-checks

[codecov-commenter]

Codecov Report

Merging #20987 (a517e01) into master (550476f) will increase coverage by 36.36%.
Report is 6 commits behind head on master.
The diff coverage is 78.35%.

@@              Coverage Diff              @@
##             master   #20987       +/-   ##
=============================================
+ Coverage     36.84%   73.20%   +36.36%     
- Complexity    12179    32458    +20279     
=============================================
  Files          1698     1887      +189     
  Lines        130330   140048     +9718     
  Branches      14247    15427     +1180     
=============================================
+ Hits          48016   102527    +54511     
+ Misses        75966    29411    -46555     
- Partials       6348     8110     +1762     

Flag	Coverage Δ
inttests	24.10% <10.30%> (-0.06%)	⬇️
systests	25.16% <8.24%> (+0.06%)	⬆️
unittests	72.47% <78.35%> (+40.50%)	⬆️

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

Files Changed	Coverage Δ
.../pulsar/broker/stats/BrokerOperabilityMetrics.java	100.00% <ø> (ø)
...ache/pulsar/client/impl/MultiTopicsReaderImpl.java	78.49% <50.00%> (+30.14%)	⬆️
...java/org/apache/pulsar/client/impl/ReaderImpl.java	85.43% <50.00%> (+18.11%)	⬆️
...rg/apache/pulsar/client/impl/PulsarClientImpl.java	74.38% <66.66%> (+14.26%)	⬆️
...ar/broker/loadbalance/impl/UniformLoadShedder.java	81.48% <77.33%> (+81.48%)	⬆️
...tion/buffer/impl/TransactionBufferHandlerImpl.java	67.92% <100.00%> (+17.92%)	⬆️
...g/apache/pulsar/client/impl/ConnectionHandler.java	90.56% <100.00%> (+18.18%)	⬆️
.../org/apache/pulsar/client/impl/ConnectionPool.java	76.09% <100.00%> (+12.91%)	⬆️

... and 1440 files with indirect coverage changes