[DOP-16941] Add spark-dialect-extension package to Clickhouse docs

[dolfinus]

Change Summary

spark-dialect-extension just got a first release. Add a note to Clickhouse documentation.

Related issue number

Checklist

• Commit message and PR title is comprehensive
• Keep the change as small as possible
• Unit and integration tests for the changes exist
• Tests pass on CI and coverage does not decrease
• Documentation reflects the changes where applicable
• docs/changelog/next_release/<pull request or issue id>.<change type>.rst file added describing change
  (see CONTRIBUTING.rst for details.)
• My PR is ready to review.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.40%. Comparing base (f8c6d3f) to head (4ffad7f).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #310      +/-   ##
===========================================
+ Coverage    95.38%   95.40%   +0.02%     
===========================================
  Files          225      225              
  Lines         8983     8983              
  Branches      1525     1525              
===========================================
+ Hits          8568     8570       +2     
+ Misses         294      292       -2     
  Partials       121      121              

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