chore: update specs to v1.0.3 (#665)

mkurapov · web-flow · commit 62f5f859a6d9 · 2025-08-11T17:47:08.000+02:00
diff --git a/open-payments-specifications b/open-payments-specifications
@@ -1 +1 @@
-Subproject commit eda1687f0ba062a98ed311775d71255b7f1d2416
+Subproject commit d0b86f6e5b391b044e9b6d0a74615a818d4ea787
