Bump defmt from 1.1.0 to 1.1.1

[cakebaker]

This PR bumps defmt from 1.1.0 to 1.1.1 to get rid of the unmaintained proc-macro-error2 (https://rustsec.org/advisories/RUSTSEC-2026-0173.html)

[codspeed-hq]

Merging this PR will degrade performance by 4.66%

❌ 1 regressed benchmark
✅ 330 untouched benchmarks
⏩ 46 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	sort_ascii_utf8_locale	15.4 ms	16.1 ms	-4.66%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing cakebaker:bump_defmt (f139279) with main (19c0226)}

Footnotes

1. 46 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/date/date-locale-hour (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/tail/inotify-dir-recreate (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/tail/tail-n0f (fails in this run but passes in the 'main' branch)
Note: The gnu test tests/misc/write-errors was skipped on 'main' but is now failing.
Skip an intermittent issue tests/pr/bounded-memory (was skipped on 'main', now failing)