fix: disable user notifications on announcement by default

It should be opt-in not opt-out.

weblate/trans/migrations/0025_alter_announcement_notify.py

@@ -0,0 +1,26 @@
+# Copyright © Michal Čihař <[email protected]>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# Generated by Django 5.0.3 on 2024-10-25 17:24
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("trans", "0024_component_key_filter"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="announcement",
+            name="notify",
+            field=models.BooleanField(
+                blank=True,
+                default=False,
+                help_text="Send notification to subscribed users.",
+                verbose_name="Notify users",
+            ),
+        ),
+    ]

weblate/trans/models/announcement.py

@@ -124,7 +124,7 @@ class Announcement(models.Model):
     )
     notify = models.BooleanField(
         blank=True,
-        default=True,
+        default=False,
         verbose_name=gettext_lazy("Notify users"),
         help_text=gettext_lazy("Send notification to subscribed users."),
     )