MAINT: add compatibility with pymc_v5

Closes #658 (closed)

Hopefully, this MR will allow both pymc4 and pymc5 to work.

bilby/core/sampler/pymc.py

@@ -657,7 +657,7 @@ class Pymc(MCMCSampler):
             ikwargs = dict(
                 model=self.pymc_model,
                 save_warmup=not self.kwargs["discard_tuned_samples"],
-                log_likeilhood=True,
+                log_likelihood=True,
             )
             trace = pymc.to_inference_data(trace, **ikwargs)