fix 02pod.t fail for lack of =encoding (RT#79481)

fix 02pod.t fail for lack of =encoding (RT#79481)

Users report 02pod.t failing due to a UTF-8 character without an
=encoding utf8 statement (arcanez and Marcel Gruenauer.)

For some reason this test passes on my machine, even though I have the
latest Test::Pod.

Marcel Gruenauer sent me a patch to RT which adds the =encoding utf8
statement at the top of the POD, which I added.

I want to use =encoding UTF-8 instead, since that's more correct, but
since I can't test it will leave utf8.