Updated a broken link to UDUNITS examples of how to format units strings

[larsbarring]

Cf. Link Checker report #370:

✗ [404] https://www.unidata.ucar.edu/software/udunits/udunits-current/udunits2lib.html#Examples | Failed: Network error: Not Found

[JonathanGregory]

Thanks for correcting this, @larsbarring. Please could you also put a line in the history.adoc as usual. It can refer to this PR, without an issue, since it's a small correction; you'll see that a few other lines in the history likewise refer to PRs.

[larsbarring]

Dear Jonathan, @JonathanGregory, as you are taking care of the link checker reports, I have put you as reviewer and eventually/possibly doing the merge. Of course, feel free to suggest, or transfer it to someone else.

Many thanks /Lars

[larsbarring]

@JonathanGregory I didn't notice that your comment popped in while I was typing. Is there a history.adoc for this repo (I could not find it)?

[JonathanGregory]

@JonathanGregory I didn't notice that your comment popped in while I was typing. Is there a history.adoc for this repo (I could not find it)?

Oh no, of course not. Sorry! No need to do anything then.