Bump node-pkware fork to 6069278 (outputBuffer under-allocation fix)

The previous fork commit (dacd10b) fixed three round-trip bugs but
left literal-only ASCII streams of certain lengths failing with
AbortedError on explode. That was outputBuffer being sized as
`inputSize + 5`, assuming compression always shrinks the data.
For literal-only inputs ASCII codes are 5-13 bits each, so the
compressed stream can exceed the raw input and implode was silently
truncating its output. Fixed at 6069278 by allocating `inputSize * 2 + 5`.

Doesn't affect any of ewd's real-world samples (they have repetitions
that drive the size down), so the 72 tests pass exactly as before.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: cinderblock