make a copy of times as attributes

Author: RemDelaporteMathurin

src/festim/exports/profile_1d.py

@@ -45,7 +45,7 @@ def __init__(
         self.t = []
         self.x = None
         self.subdomain = subdomain
-        self.times = times
+        self.times = times.copy() if times is not None else None
 
         self._dofs = None
         self._sort_coords = None