Chore: Gilda annotate changes return data format in release 1.5.0

[DnlRKorn]

In Gilda==1.5.0 annotate was changed to return an object instead of a tuple, so the following line fails.

ontology-access-kit/src/oaklib/implementations/gilda.py

Line 78 in aaede8e

for match_text, match, start, end in annotate(text, grounder=self.grounder):

Currently we downgrade to Gilda<1.5 to avoid this