chore: update contribution guide

[amitmiran137]

SUMMARY

update explanations about running common tasks like pylint and… pre-commit

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TEST PLAN

ADDITIONAL INFORMATION

• Has associated issue:
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API

[codecov-io]

Codecov Report

Merging #12571 (66e094b) into master (deebd6f) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #12571      +/-   ##
==========================================
- Coverage   66.75%   66.75%   -0.01%     
==========================================
  Files        1015     1015              
  Lines       49633    49633              
  Branches     4839     4839              
==========================================
- Hits        33133    33131       -2     
- Misses      16377    16379       +2     
  Partials      123      123              

Flag	Coverage Δ
cypress	50.98% <ø> (+<0.01%)	⬆️
javascript	60.74% <ø> (ø)
python	63.95% <ø> (-0.02%)	⬇️

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

Impacted Files	Coverage Δ
superset/db_engine_specs/presto.py	81.38% <0.00%> (-0.65%)	⬇️
...set-frontend/src/dashboard/util/getDropPosition.js	93.65% <0.00%> (+1.58%)	⬆️

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