sewing machine: Fix copyright notice

wjt · wjt · commit fbf62509422c · 2025-12-17T15:14:50.000Z
The Copyright line should include (optionally, date, and) the owner's name, not
the URL to the specific asset.
diff --git a/assets/third_party/sewing-machine/746897__kzarkses__machantq_sewing-machine-running_cp_none_mke600.ogg.license b/assets/third_party/sewing-machine/746897__kzarkses__machantq_sewing-machine-running_cp_none_mke600.ogg.license
@@ -1,3 +1,5 @@
-MACHAntq_Sewing Machine Running_CP_NONE_MKE600
-Copyright 2024 kzarkses -- https://freesound.org/s/746897/
+Copyright 2024 kzarkses
 SPDX-License-Identifier: CC-BY-4.0
+
+MACHAntq_Sewing Machine Running_CP_NONE_MKE600
+https://freesound.org/s/746897/
