docs: Fix README computation typo

[daniyal-rana]

Summary

• Fix typo in the top-level README: computaiton -> computation.

Testing

• Not run; documentation-only change.

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[greptile-apps]

Greptile Summary

This PR fixes a typo in the top-level README. The main change is:

• Corrects computaiton to computation in descriptive prose.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
README.md	Corrects a spelling typo in plain README prose.

_{Reviews (1): Last reviewed commit: "Fix README computation typo" | Re-trigger Greptile}