[Fixes #12250] Add missing migration (#12251) (#12252)

(cherry picked from commit 0a76441)

Co-authored-by: mattiagiupponi <[email protected]>

geonode/base/migrations/0091_alter_hierarchicalkeyword_slug.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.2.9 on 2024-05-21 08:23
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("base", "0090_alter_resourcebase_polymorphic_ctype"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="hierarchicalkeyword",
+            name="slug",
+            field=models.SlugField(allow_unicode=True, max_length=100, unique=True, verbose_name="slug"),
+        ),
+    ]