fix np.random.default_rng() calls

src/mqt/qecc/analog_information_decoding/utils/simulation_utils.py

@@ -98,7 +98,7 @@ def generate_err(
     residual_err_z = residual_err[1]
 
     for i in range(nr_qubits):
-        rand = np.random.default_rng()  # this returns a random float in [0,1)
+        rand = np.random.default_rng().random()  # this returns a random float in [0,1)
         # e.g. if err channel is p = 0.3, then an error will be applied if rand < p
         if rand < channel_probs_z[i]:  # if probability for z error high enough, rand < p, apply
             # if there is a z error on the i-th bit, flip the bit but take residual error into account
@@ -165,7 +165,7 @@ def generate_syndr_err(channel_probs: NDArray[np.float64]) -> NDArray[np.int32]:
     error: NDArray[np.int32] = np.zeros_like(channel_probs, dtype=np.int32)
 
     for i, p in np.ndenumerate(channel_probs):
-        rand = np.random.default_rng()
+        rand = np.random.default_rng().random()
 
         if rand < p:
             error[i] = 1