Primary test compilers in release notes

https://www.boost.org/users/history/version_1_76_0.html#version_1_76_0.compilers_tested says:

- GCC: 4.4.7, 4.5.3, 4.6.3, 5.4.0, 8.0.1
- GCC, C++0x: 4.4.7
- GCC, C++11: 4.7.3, 4.8.5, 4.9.4, 5.4.0, 6.4.0, 7.1.0, 8.0.1
- GCC, C++14: 5.4.0, 5.5.0, 6.4.0, 7.1.0, 7.3.0, 8.0.1
- GCC, C++17: 7.3.0, 8.0.1

If this is correct it's very worrying. None of those releases are still supported or maintained. And 8.0.1 isn't even a release, it's a pre-release snapshot.

Please either update it to be accurate, or consider testing on more modern systems, e.g. RHEL 8 uses GCC 8.4, Ubuntu 20.04 uses GCC 9.2