update string of all clean documentation

[qidanrui]

Description

Update string matching in all clean documentation

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have already squashed the commits and make the commit message conform to the project standard.
• [x] I have already marked the commit with "BREAKING CHANGE" or "Fixes #" if needed.
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules

[codecov[bot]]

Codecov Report

Merging #726 (723c31c) into develop (f238e6c) will decrease coverage by 0.00%. The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #726      +/-   ##
===========================================
- Coverage    56.17%   56.16%   -0.01%     
===========================================
  Files          288      288              
  Lines        18223    18223              
===========================================
- Hits         10236    10235       -1     
- Misses        7987     7988       +1     

Impacted Files	Coverage Δ
dataprep/__init__.py	100.00% <100.00%> (ø)
dataprep/eda/diff/render.py	91.00% <0.00%> (-0.36%)	:arrow_down:
dataprep/eda/correlation/compute/overview.py	99.24% <0.00%> (ø)

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