Minor nit fix to EVP_CipherFinal_ex() return code documentation. #414

Job	Run time
address_ub_sanitizer	11m 12s
basic_clang	6m 1s
basic_gcc	6m 13s
check_docs	59s
check_update	1m 21s
check-ansi	2m 40s
enable_non-default_options	4m 50s
external-tests-misc	8m 37s
external-tests-providers	8m 38s
external-tests-pyca (1.51.0, 3.9)	6m 48s
full_featured	6m 27s
fuzz_tests	3m 2s
legacy	4m 59s
memory_sanitizer	18m 4s
minimal	2m 40s
no-deprecated	5m 29s
no-legacy	5m 53s
non-caching	12m 24s
no-shared-macos (macos-13)	6m 23s
no-shared-macos (macos-14)	4m 7s
no-shared-ubuntu	4m 59s
out-of-readonly-source-and-install-ubuntu	7m 41s
out-of-readonly-source-and-install-macos (macos-13)	12m 3s
out-of-readonly-source-and-install-macos (macos-14)	6m 17s
self-hosted	0s
threads_sanitizer	5m 35s
	2h 43m 22s

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