Update psirng randn function to handle new API response format

Author: nullspook

modules/rng_psirng.py

@@ -19,4 +19,4 @@ def __new__(cls):
     def randn(self, shape):
         response = requests.get(f"{self.base_url}/api/randnormal?mean=0.0&stddev=1.0&length={np.prod(shape)}")
         response.raise_for_status()
-        return np.array(response.json()).reshape(shape)
+        return np.array(response.json()["data"]).reshape(shape)