Fixing new bug in calculation of systematic error.

rdstar/offline_analysis/fitting/dedicated_fit_approach/dedicated_fit_routine.py

@@ -594,7 +594,7 @@ class SysResultItem:
                 tuple(base_result.param_values[:2]),
             )
 
-        errors: np.ndarray = np.sqrt(np.square(np.abs(base_result.errors[:2]) - np.square(this_result.errors[:2])))
+        errors: np.ndarray = np.sqrt(np.abs(np.square(base_result.errors[:2]) - np.square(this_result.errors[:2])))
         relative_errors: np.ndarray = errors / base_result.param_values[:2]
 
         rd_error: float = errors[0]