[3.0.x] Refs #30947 -- Changed tuples to lists in model Meta options examples in docs.

Follow up to 97d3321e89.

Backport of e5cacb1f47 from master

docs/topics/db/examples/many_to_many.txt

@@ -18,7 +18,7 @@ objects, and a ``Publication`` has multiple ``Article`` objects:
         title = models.CharField(max_length=30)
 
         class Meta:
-            ordering = ('title',)
+            ordering = ['title']
 
         def __str__(self):
             return self.title
@@ -28,7 +28,7 @@ objects, and a ``Publication`` has multiple ``Article`` objects:
         publications = models.ManyToManyField(Publication)
 
         class Meta:
-            ordering = ('headline',)
+            ordering = ['headline']
 
         def __str__(self):
             return self.headline

docs/topics/db/examples/many_to_one.txt

@@ -23,7 +23,7 @@ To define a many-to-one relationship, use :class:`~django.db.models.ForeignKey`:
             return self.headline
 
         class Meta:
-            ordering = ('headline',)
+            ordering = ['headline']
 
 What follows are examples of operations that can be performed using the Python
 API facilities.