chore: Bump swift grammar

jcs090218 · github-actions[bot] · commit bf1c539f4d8a · 2025-08-03T02:35:26.000Z
diff --git a/repos/swift b/repos/swift
@@ -1 +1 @@
-Subproject commit fc65dc2cc87047c3a45f1d26cce79ab9062a4881
+Subproject commit 78d84ef82c387fceeb6094038da28717ea052e39
