update readme and chirps test

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (70157bb) 73.31% compared to head (1a3a6d9) 73.31%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #207 +/- ## ======================================= Coverage 73.31% 73.31% ======================================= Files 43 43 Lines 1825 1825 ======================================= Hits 1338 1338 Misses 487 487 ```

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