doc: update examples to explain ghc-component and aliases

[frasertweedale]

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Advisory

• [ ] It's not duplicated
• [ ] All fields are filled
• [ ] It is validated by hsec-tools

hsec-tools

• [ ] Previous advisories are still valid

[frasertweedale]

@blackheaven CI nix job is failing due to out of disk error:

write /nix/store/q3y9jmlsfkpk0kgpc6spvkgk3hgsxphh-ghc-9.2.8/lib/ghc-9.2.8/haskeline-0.8.2/libHShaskeline-0.8.2-ghc9.2.8.so: no space left on device

Do you have time to look into it?

[blackheaven]

I'll have a look

[mihaimaruseac]

The Nix job passed now, merging this one