Rename permission created by demo plugin

It was showing up as 'new-permission' on https://latest.datasette.io/-/permissions
which I thought was confusing

tests/plugins/my_plugin.py

@@ -413,9 +413,9 @@ def register_permissions(datasette):
     extras = datasette.plugin_config("datasette-register-permissions") or {}
     permissions = [
         Permission(
-            name="new-permission",
+            name="permission-from-plugin",
             abbr="np",
-            description="New permission",
+            description="New permission added by a plugin",
             takes_database=True,
             takes_resource=False,
             default=False,

tests/test_plugins.py

@@ -1069,10 +1069,10 @@ async def test_hook_register_permissions(extra_metadata):
         plugins_dir=PLUGINS_DIR,
     )
     await ds.invoke_startup()
-    assert ds.permissions["new-permission"] == Permission(
-        name="new-permission",
+    assert ds.permissions["permission-from-plugin"] == Permission(
+        name="permission-from-plugin",
         abbr="np",
-        description="New permission",
+        description="New permission added by a plugin",
         takes_database=True,
         takes_resource=False,
         default=False,