Fix README typos

[ggrell]

Summary

• correct spelling of repositories in Groovy snippets

Testing

• ./gradlew test (fails: SDK location not found)

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https://chatgpt.com/codex/tasks/task_e_684dc5aed940832298b1970f51892b6f

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.11%. Comparing base (a04b900) to head (212f936).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #303   +/-   ##
=========================================
  Coverage     88.11%   88.11%           
  Complexity       48       48           
=========================================
  Files             9        9           
  Lines           101      101           
=========================================
  Hits             89       89           
  Misses           12       12           

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