Fix tagged union serialization warning when using aliases #5025

Job	Run time
rust benchmarks	2m 25s
build on ${{ matrix.os }} (${{ matrix.target }} - ${{ matrix.interpreter \|\| 'all' }}${{ (((matrix.os == 'linux') && format(' - {0}', (((matrix.manylinux == 'auto') && 'manylinux') \|\| matrix.manylinux))) \|\| '') }})	0s
build pgo-optimized on ${{ matrix.os }} / ${{ matrix.interpreter }}	0s
build sdist	15s
build-wasm-emscripten	2m 23s
coverage	1m 57s
lint	51s
test-debug 3.11	55s
test-debug pypy3.10	1m 19s
test MSRV	2m 24s
test on ubuntu	1m 53s
test on macos	1m 47s
test-pydantic-integration	1m 48s
test 3.8	2m 0s
test on windows	4m 26s
test 3.9	2m 8s
test 3.10	2m 0s
test 3.11	1m 52s
test 3.12	1m 59s
test 3.13	2m 5s
test pypy3.9	2m 21s
test pypy3.10	2m 16s
test build on ${{ matrix.target }}-${{ matrix.distro }}	0s
test build on ${{ matrix.os }}	0s
inspect-pypi-assets	0s
check	4s
release	0s
	39m 8s

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