Daily rc sync to master (#6782)

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pennylane/devices/qubit/sampling.py

@@ -330,7 +330,7 @@ def _process_single_shot(samples):
             prng_key=prng_key,
         )
     except ValueError as e:
-        if str(e) != "probabilities contain NaN":
+        if "probabilities contain nan" not in str(e).lower():
             raise e
         samples = qml.math.full((shots.total_shots, len(wires)), 0)