Enhance title of animation in Animation Tutorial

[navidcy]

The animation tutorial produces a title using:

ax.set_title(f"time: {str(da['time'][timestamp].values)}")

and this results into a bunch of trailing zeros reporting the time down to the nanosecond!

It would be nice if we can format the title better.

Paraphrased from a comment originally posted by @adele-morrison in #452 (comment)

[julia-neme]

I think this was fixed in #455 - unless you wanted a title other than dates.

[navidcy]

Great!