Bug fix for retrieve from faiss by prompt (#914)

There was a bug in the retrieve from faiss by prompt component related
to cpu.
The number of workers was calculated as float instead of an int.

src/fondant/components/retrieve_from_faiss_by_prompt/src/main.py

@@ -61,7 +61,7 @@ def setup(self) -> Client:
         # We need at least 8Gb RAM for the datacomp small faiss index
         # We should consider calculating the memory required for the index based on the faiss
         # index size
-        cores_to_utilise = total_memory // 8
+        cores_to_utilise = int(total_memory // 8)
         cluster = LocalCluster(
             processes=True,
             n_workers=cores_to_utilise,