added birth name and bio in Artist model

bellapanghulan_music/homepage/models.py

@@ -3,6 +3,9 @@ from django.db import models
 class Artist(models.Model):
     artist_name = models.CharField(max_length = 50)
     monthly_listeners = models.IntegerField(default = 0)
+    birth_name = models.CharField(max_length = 50, null = True, blank = True)
+    bio = models.TextField(max_length = 700, null = True, blank = True)
+
 
 class Album(models.Model):
     artist = models.ForeignKey(Artist, on_delete = models.CASCADE)