QUIC: Update README and CHANGES for 3.1.7 #413

Job	Run time
check_docs	1s
check_docs	51s
basic_gcc	1s
basic_gcc	4m 20s
basic_clang	1s
basic_clang	4m 21s
check_update	1s
check_update	1m 19s
check-ansi	1s
check-ansi	2m 8s
minimal	1s
minimal	1m 59s
address_ub_sanitizer	1s
address_ub_sanitizer	9m 7s
buildtest	1s
buildtest	5m 47s
enable_non-default_options	1s
enable_non-default_options	3m 34s
external-test-pyca (1.51.0, 3.9)	1s
external-test-pyca (1.51.0, 3.9)	8m 13s
external-tests	1s
external-tests	12m 47s
fips_and_ktls	1s
fips_and_ktls	4m 12s
legacy	1s
legacy	3m 36s
memory_sanitizer	1s
memory_sanitizer	20m 34s
no-deprecated	1s
no-deprecated	4m 1s
no-legacy	1s
no-legacy	4m 10s
non-caching	1s
non-caching	6m 11s
no-shared-macos (macos-13)	7m 32s
no-shared-macos (macos-13)	7m 32s
no-shared-ubuntu	1s
no-shared-ubuntu	3m 25s
no-shared-macos (macos-14)	2m 32s
no-shared-macos (macos-14)	2m 32s
out-of-readonly-source-and-install-macos (macos-13)	10m 48s
out-of-readonly-source-and-install-macos (macos-13)	10m 48s
out-of-readonly-source-and-install-ubuntu	1s
out-of-readonly-source-and-install-ubuntu	5m 58s
out-of-readonly-source-and-install-macos (macos-14)	5m 18s
out-of-readonly-source-and-install-macos (macos-14)	5m 18s
self-hosted	0s
self-hosted	0s
threads_sanitizer	1s
threads_sanitizer	3m 23s
	2h 42m 36s

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