document pre-commit install

[jakob-keller]

Description of Change

Document pre-commit install step for contributors.

Assumptions

Replace this text with any assumptions made (if any)

Checklist for All Submissions

• I have added change info to CHANGES.rst
• If this is resolving an issue (needed so future developers can determine if change is still necessary and under what conditions) (can be provided via link to issue with these details):
  • Detailed description of issue
  • Alternative methods considered (if any)
  • How issue is being resolved
  • How issue can be reproduced
• If this is providing a new feature (can be provided via link to issue with these details):
  • Detailed description of new feature
  • Why needed
  • Alternatives methods considered (if any)

Checklist when updating botocore and/or aiohttp versions

• I have read and followed CONTRIBUTING.rst
• I have updated test_patches.py where/if appropriate (also check if no changes necessary)
• I have ensured that the awscli/boto3 versions match the updated botocore version

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.12%. Comparing base (24108bf) to head (c8e8078).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1249      +/-   ##
==========================================
- Coverage   88.16%   88.12%   -0.04%     
==========================================
  Files          67       67              
  Lines        5904     5904              
==========================================
- Hits         5205     5203       -2     
- Misses        699      701       +2     

Flag	Coverage Δ
unittests	88.12% <ø> (-0.04%)	⬇️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.