mention g3proxy and g3bench in readme #1091

Job	Run time
address_ub_sanitizer	10m 57s
basic_clang	7m 51s
basic_gcc	9m 14s
check-ansi	1m 55s
check_update	1m 33s
minimal	2m 7s
no-deprecated	6m 26s
non-caching	4m 11s
no-shared (ubuntu-latest)	3m 14s
no-shared (macos-latest)	5m 37s
buildtest	11m 48s
enable_non-default_options	3m 32s
fips_and_ktls	4m 17s
legacy	3m 39s
memory_sanitizer	25m 36s
no-legacy	8m 10s
ntls_address_ub_sanitizer	9m 42s
ntls_memory_sanitizer	17m 56s
phe_test	50m 1s
symbol_prefix-test	7m 1s
threads_sanitizer	5m 13s
EC_POINTs_api_test	18m 52s
external-test-pyca (1.51.0, 3.9)	1m 26s
ntls-with-fips	7m 55s
ntls-without-sm234	6m 40s
out-of-source-and-install (ubuntu-latest)	6m 52s
out-of-source-and-install (macos-latest)	9m 36s
smtc_and_ntls	15m 9s
zkp-build-test	4m 53s
	4h 31m 23s

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