upgrade to smallvec 2 to fix invariant lifetimes #587

Job	Run time
bench	58s
build pgo-optimized on ${{ matrix.os }} / ${{ matrix.interpreter }}	0s
build on ${{ matrix.os }} (${{ matrix.target }} - ${{ matrix.interpreter \|\| 'all' }}${{ (((matrix.os == 'linux') && format(' - {0}', (((matrix.manylinux == 'auto') && 'manylinux') \|\| matrix.manylinux))) \|\| '') }})	0s
build sdist	11s
fuzz on ubuntu-latest	1m 6s
lint	19s
fuzz skip	53s
fuzz on macos-latest	17m 45s
resolve	6s
test on macos-latest	1m 0s
test jiter-python	40s
test on macos-latest	52s
test build on ${{ matrix.target }}-${{ matrix.distro }}	0s
test build on ${{ matrix.os }}	0s
test rust-stable on linux	49s
test rust-nightly on linux	1m 27s
test rust-1.74.0 on linux	31s
inspect-pypi-assets	0s
check	3s
release	0s
release-python	0s
	26m 40s

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