Update liboqs readme to point to oqs-provider instead of deprecated o… #1481

Job	Run time
Check code formatting	1m 14s
Check upstream code is properly integrated	1m 17s
Check that code passes a basic build before starting heavier tests	1m 2s
linux_intel (alpine, openquantumsafe/ci-alpine-amd64:latest, -DOQS_STRICT_WARNINGS=ON -DOQS_USE_O...	5m 5s
linux_intel (alpine-openssl-all, openquantumsafe/ci-alpine-amd64:latest, -DOQS_STRICT_WARNINGS=ON...	12m 53s
linux_intel (alpine-noopenssl, openquantumsafe/ci-alpine-amd64:latest, -DOQS_STRICT_WARNINGS=ON -...	4m 57s
linux_cross_compile (windows-binaries, -DCMAKE_TOOLCHAIN_FILE=../.CMake/toolchain_windows-amd64.c...	1m 24s
linux_arm_emulated (armhf, armhf, -DOQS_ENABLE_SIG_SPHINCS=OFF -DOQS_USE_OPENSSL=OFF -DOQS_OPT_TA...	10m 13s
linux_cross_compile (windows-dll, -DCMAKE_TOOLCHAIN_FILE=../.CMake/toolchain_windows-amd64.cmake ...	1m 26s
linux_intel (focal-nistr4-openssl, openquantumsafe/ci-ubuntu-focal-x86_64:latest, -DOQS_STRICT_WA...	3m 47s
linux_intel (jammy-std-openssl3, openquantumsafe/ci-ubuntu-jammy:latest, -DOQS_STRICT_WARNINGS=ON...	3m 26s
linux_intel (address-sanitizer, openquantumsafe/ci-ubuntu-focal-x86_64:latest, -DCMAKE_C_COMPILER...	7m 42s
	54m 26s

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