Apply migrations to Link model (#2187)

Oops! While #2185 didn't change anything about the structure of the Link model, it did update a description of a property, so this PR is running our "make migrations" command to commit those db migrations.

shortlinks/migrations/0002_alter_link_slug.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.4 on 2021-08-25 17:59
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('shortlinks', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='link',
+            name='slug',
+            field=models.SlugField(help_text="The slug of the link. This will be used in the short link, so try to keep it short yet (hopefully) memorable. NOTE: the slug will be saved as fully lowercase (i.e. 'hOMe' will be saved as 'home').", max_length=200, unique=True),
+        ),
+    ]