Fix spelling errors in comments

[Mdsujansarkar]

Fix several spelling errors across the codebase:

• simd: "independant" to "independent"
• simd: "overriden" to "overridden"
• encoding/json/v2: "wether" to "whether"
• internal/trace: "overriden" to "overridden"

These are simple typo corrections in code comments that improve
documentation quality without affecting functionality.

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Patch Set 1:

(1 comment)

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