Update discord_bot.py

Author: typpo

examples/discord_bot.py

@@ -37,11 +37,11 @@ async def graph(ctx):
         output_buffer = BytesIO()  # By using BytesIO we don't have to save the file in our system.
         chat_sample.save(output_buffer, "png")
         output_buffer.seek(0)
-    await ctx.send(file=discord.File(fp=output_buffer, filename="chat_sample.png"))  # Change the file name accordingly.
+    await ctx.send(file=discord.File(fp=output_buffer, filename="chart_sample.png"))  # Change the file name accordingly.
 
 
 @graph.before_invoke
 async def before_test_invoke(ctx):
     await ctx.trigger_typing()  # Take time to render and send graph so triggering typing to reflect bot action.
 
-bot.run('token')
+bot.run('token')