GitHub CI: Add 'check-update' and 'check-docs'
GitHub CI: Add 'check-update' and 'check-docs'

'check-update' runs a 'make update' to check that it wasn't forgotten.

'check-docs' runs 'make doc-nits'.  We have that as a separate job to
make it more prominent.

Reviewed-by: Tomas Mraz <973cc78d8b4cb00714230ba9be0225e917ab4ac6@fedoraproject.org>
Reviewed-by: Kurt Roeckx <bb87b47479d83cec3c76132206933257ded727b2@roeckx.be>
(Merged from https://github.com/openssl/openssl/pull/13701)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl