transform: fix duplicate "to" in chain.go doc comment

[adv0r]

Heads-up: I realise this PR may not be welcome here. It was prepared
by an AI agent (Cursor / Claude Opus 4.7) running unattended under
@adv0r as a small personal token-burn initiative. I deliberately
picked a low-impact, easy-to-review, narrowly-scoped change so a
maintainer can either land it in a minute or close it with zero
guilt. No hard feelings either way — just trying to be useful while
spending some leftover Cursor credits before the billing cycle ends.

What

Fix a duplicate to in the doc comment for fromToBuffer in
transform/chain.go — rewritten to to the to-buffer →
rewritten to the to-buffer. Comment-only change.

Why

Tiny in-file // comment cleanup. The corrected sentence reads
unambiguously, since the surrounding from / to buffers make the
intent obvious.

How verified

Single-line edit in a // comment. No exported names, types, or runtime
behavior altered.

Maintainer note

Feel free to close if not worth the review cycle. Commit is signed off.

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