Refactor Development Cycle Documentation for Clarity and Consistency

[donatik27]

This pull request updates the DEVELOPMENT.md file to enhance clarity and consistency in the description of our development cycles. Key changes include:

• Cycle Duration Clarification: Updated the cycle description from "3-weeks" to "3-week" for grammatical accuracy.

• Review Time Estimation: Improved the phrasing to "1/3 of our time doing reviews" for better readability.

These changes aim to provide a clearer understanding of our development process and ensure the documentation is professional and precise.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.06%. Comparing base (b624598) to head (999db8e).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1217   +/-   ##
=======================================
  Coverage   92.06%   92.06%           
=======================================
  Files          49       49           
  Lines        1398     1398           
=======================================
  Hits         1287     1287           
  Misses        111      111           

see 2 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b624598...999db8e. Read the comment docs.

[andrew-fleming]

Thanks, @donatik27!