Update Robocop urls & fix typos and grammatical errors

[bhirsz]

No description provided.

[Mko13]

Here, we meant to avoid a case like this:

    Log Many   aaa    bbb
    ...    ccc    ddd
    ...                           <--- Line continued, but no arguments on this line.
    ...    eee    fff

Probably, to-many-arguments is not relevant to this case.

I think, robocop does not check the case in the above example, or was there a corresponding rule that I couldn't find?

[bhirsz]

Yes, that's incorrect rule chosen.. It's checked by https://robocop.dev/stable/rules_list/#var01-empty-variable - ... is actually equivalent to ... ${EMPTY}. I will correct the rule name