build(deps): Bump smallvec from 1.16.2 to 1.16.3 in the cargo group

[dependabot]

Bumps the cargo group with 1 update: smallvec.

Updates smallvec from 1.16.2 to 1.16.3

Release notes

Sourced from smallvec's releases.

v1.16.3

What's Changed

• Port new fuzzer to v1 by @​bolshoytoster in servo/rust-smallvec#678
• fix: overflow during fuzzy check by @​GauravPawar101 in servo/rust-smallvec#693
• chore: bump version by @​alejandro-vaz in servo/rust-smallvec#723

Full Changelog: servo/rust-smallvec@v1.16.2...v1.16.3

Commits

• 7ad35d2 chore: bump version (#723)
• 8aaf33e fix: overflow during fuzzy check (#693)
• c936db1 Port new fuzzer to v1 (#678)
• See full diff in compare view

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[github-actions]

Speed against dccb4ddc

Measured on AMD EPYC 9V74 80-Core Processor.
Both sides built with rustc 1.99.0 (b940084d7 2026-09-28).

Both sides built and run on this runner in this job, the way
scripts/speed.sh measures a perf commit. Each round runs
both sides on a layout of its own, the same compiled code with
its code and data shuffled and moved, so the 95% interval carries
where the code landed as well as the run. The verdict holds the
interval against a 1% threshold. The default layout, the one a
release ships, is measured after as a diagnostic. The node
counts are the search's: they move when the search does, and a
speed change leaves them alone.

round     base nps  candidate nps  change
    1      6062365        6087250   +0.4%
    2      6042112        6041095   -0.0%
    3      5973234        6023367   +0.8%
    4      5995762        6031415   +0.6%
    5      5971376        5987667   +0.3%
    6      5989088        6048568   +1.0%
    7      6037778        6018609   -0.3%
    8      6058281        5945677   -1.9%
    9      6037169        6049108   +0.2%
   10      6012603        6074048   +1.0%
   11      6033617        5996007   -0.6%
   12      5992009        5982305   -0.2%
   13      6018190        5984856   -0.6%
   14      6032435        5965693   -1.1%
   15      5951113        5990355   +0.7%
   16      5996031        6044849   +0.8%
   17      5936468        5965162   +0.5%
   18      6030335        6027544   -0.0%
   19      6020771        6015693   -0.1%
   20      5964257        6013091   +0.8%
   21      6046346        5930831   -1.9%
   22      6022308        6028501   +0.1%
   23      5998774        6031507   +0.5%
   24      5956512        6044880   +1.5%
   25      5987607        6000940   +0.2%
   26      6059504        6018509   -0.7%
   27      6042192        5994318   -0.8%
   28      6023066        5982197   -0.7%
   29      5921501        5999484   +1.3%
   30      5982458        6009689   +0.5%
   31      5977075        5982089   +0.1%
   32      5996767        5997298   +0.0%
   33      5956801        5985388   +0.5%
   34      6022162        6081860   +1.0%
   35      6067393        5980369   -1.4%
   36      6043660        6025051   -0.3%
   37      5884960        6023678   +2.4%
   38      5973851        6033024   +1.0%
   39      5990322        6036897   +0.8%
   40      5949138        5970730   +0.4%

              nodes    time  median nps  faster half
base       11916992  1.99 s     5997770      6035553
candidate  11916992  1.98 s     6014392      6039273
change                            +0.3%        +0.1%

paired change +0.2%, 95% interval -0.1% to +0.5%
diagnostic, on the default layout alone +0.2%, 95% interval -0.3% to +0.6%, 13 rounds

no change beyond ±1.0%: the whole interval is inside it

Speed: +0.2% (bench nps, 95% interval -0.1% to +0.5%, 40 interleaved rounds over shuffled layouts vs dccb4ddc)

The instructions each side's bench executed, counted under
cachegrind. The count repeats to within a few hundred
instructions, so a small change here is a real one, but it
prices instructions only: cache misses, mispredicted branches
and where the code lands are the speed's to show.

instructions against dccb4ddc, one cachegrind run a side, bench

             instructions     nodes  per node
base       15,968,842,267  11916992    1340.0
candidate  15,968,844,181  11916992    1340.0
change             +0.00%              +0.00%

within ±0.7%, as far as edits not made for speed have moved the count