fix: proper pluralization in validation error messages #3841

Job	Run time
build on ${{ matrix.platform \|\| matrix.os }} (${{ matrix.target }} - ${{ matrix.manylinux \|\| 'auto' }})	0s
rust benchmarks	4m 25s
build pgo-optimized on ${{ matrix.platform \|\| matrix.os }} (${{ matrix.interpreter }} - ${{ matrix.target }} - ${{ matrix.manylinux \|\| 'auto' }})	0s
build sdist	21s
build-wasm-emscripten	3m 25s
coverage	3m 29s
lint	1m 14s
test-debug 3.11	1m 12s
test-debug pypy3.10	2m 7s
test on ubuntu	2m 54s
test-pydantic-integration	2m 45s
test on macos	5m 53s
test 3.7	2m 39s
test on windows	5m 46s
test 3.8	2m 51s
test 3.9	3m 26s
test 3.10	3m 32s
test 3.11	3m 1s
test 3.12-dev	3m 22s
test pypy3.7	4m 6s
test pypy3.8	4m 20s
test pypy3.9	3m 11s
test pypy3.10	3m 42s
test build on ${{ matrix.target }}-${{ matrix.distro }}	0s
test build on ${{ matrix.os }}	0s
inspect-pypi-assets	0s
check	2s
release	0s
	1h 7m 43s

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