Update dfttk/thermal_electronic/thermal_electronic.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: nhew1994

dfttk/thermal_electronic/thermal_electronic.py

@@ -780,7 +780,7 @@ def plot_fermi_dirac_distribution(
         temperature and chemical potential.
 
         Args:
-            energy (np.ndarray): Energy values for the electron DOS, in eV.
+            energies (np.ndarray): Energy values for the electron DOS, in eV.
             fermi_dist (np.ndarray): Fermi-Dirac distribution function values.
             chemical_potential (float): Chemical potential for a given volume and
                 temperature, in eV.