Update PPL docs link for workbench

[joshuali925]

Signed-off-by: Joshua Li [email protected]

Description

closes #749

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 94.83%. Comparing base (deececb) to head (9f2aa44).
⚠️ Report is 1057 commits behind head on main.

Files with missing lines	Patch %	Lines
workbench/public/components/Main/main.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #758   +/-   ##
=========================================
  Coverage     94.83%   94.83%           
  Complexity     2898     2898           
=========================================
  Files           287      287           
  Lines          7803     7803           
  Branches        568      568           
=========================================
  Hits           7400     7400           
  Misses          349      349           
  Partials         54       54           

Flag	Coverage Δ
query-workbench	62.76% <0.00%> (ø)
sql-engine	97.78% <ø> (ø)

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