Fix rich Table.grid call

src/reactor_sim/rich_dashboard.py

@@ -21,7 +21,10 @@ LOGGER = logging.getLogger(__name__)
 
 
 def _table(title: str) -> Table:
-    return Table.grid(expand=True, padding=(0, 1), title=title, title_style="bold cyan")
+    tbl = Table.grid(expand=True, padding=(0, 1))
+    tbl.title = title
+    tbl.title_style = "bold cyan"
+    return tbl
 
 
 class RichDashboard:
@@ -128,4 +131,3 @@ class RichDashboard:
         finally:
             if self.save_path and self.sim and self.sim.last_state:
                 self.reactor.save_state(self.save_path, self.sim.last_state)
-