add max length to usecase logo field

Author: Deepthi-Chand

api/models/UseCase.py

@@ -21,7 +21,9 @@ class UseCase(models.Model):
     id = models.AutoField(primary_key=True)
     title = models.CharField(max_length=200, unique=True, blank=True, null=True)
     summary = models.CharField(max_length=10000, blank=True, null=True)
-    logo = models.ImageField(upload_to=_use_case_directory_path, blank=True, null=True)
+    logo = models.ImageField(
+        upload_to=_use_case_directory_path, max_length=300, blank=True, null=True
+    )
     created = models.DateTimeField(auto_now_add=True)
     modified = models.DateTimeField(auto_now=True)
     website = models.URLField(blank=True)