input: Write a python function to create a DataFrame from a dictionary and write it to an Excel file.
  assert save_to_excel({'name': 'John Smith', 'age': 28, 'gender': 'Male'}, 'test.xlsx') == True
  assert save_to_excel({'name': 'Jane Doe', 'age': 32, 'gender': 'Female'}, 'test2.xlsx') == True
  assert save_to_excel({'name': 'Tom Brown', 'age': 45, 'gender': 'Male'}, 'test3.xlsx') == True
output: import pandas as pd
  
  def save_to_excel(data_dict, file_name):
      df = pd.DataFrame([data_dict])
      df.to_excel(file_name, index=False)
      return True