Fix session print for dtls1.3 #356

Job	Run time
address_ub_sanitizer	11m 13s
basic_clang	6m 6s
basic_gcc	6m 58s
check_docs	59s
check_update	1m 15s
check-ansi	2m 50s
enable_non-default_options	5m 11s
external-test-cf-quiche	3m 55s
external-test-pyca (1.51.0, 3.9)	6m 46s
external-tests	10m 56s
full_featured	6m 45s
fuzz_tests	3m 7s
legacy	5m 21s
memory_sanitizer	20m 3s
minimal	2m 39s
no-deprecated	5m 50s
no-legacy	6m 35s
non-caching	17m 14s
no-shared-macos (macos-13)	8m 34s
no-shared-ubuntu	5m 32s
no-shared-macos (macos-14)	4m 24s
out-of-readonly-source-and-install-macos (macos-13)	13m 13s
out-of-readonly-source-and-install-ubuntu	9m 4s
out-of-readonly-source-and-install-macos (macos-14)	6m 34s
self-hosted	0s
threads_sanitizer	6m 23s
	2h 57m 27s

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