* Drop Fedora 33
By the time we release, it's going to reach EOL.
* Drop Raspberry Pi OS 10, add support for 11
* Bring RPi OS 10 back
* Add Alma Linux 8
* Fix-up RHEL EOL dates
* Add '(Legacy)' to Raspberry Pi OS 10
* Drop CentOS 8
* Exclude include files from being built
* Split install guides into multiple documents (one per OS/version combo)
* Update references
* Unify anchor names
* Update pyenv requirements in CentOS 7 guide
* Update install guides for RHEL derivatives to not use pyenv
* Add guide for Rocky Linux 8
* 8.4+ -> 8.4-8.x
* Add 'the'