remove exception on 421 validation responses #1554

Job	Run time
skip_check	6s
lint (3.13)	26s
type_check (3.13)	36s
type_check (3.10)	26s
type_check (3.11)	35s
get_version	7s
lint (3.10)	25s
type_check (3.12)	32s
lint (3.12)	25s
patch_version / patch_version	8s
lint (3.11)	27s
test (3.11)	1m 14s
test_non_linux (3.13, windows-2025)	1m 34s
test (3.10)	1m 14s
test_non_linux (3.13, macos-13)	1m 7s
test (3.13)	1m 10s
test (3.12)	1m 13s
test_non_linux (3.13, macos-14)	28s
test_non_linux (3.13, windows-2022)	1m 35s
extract_changelog / extract_changelog	9s
	13m 57s

Provide feedback