Bump xpm submodules to point to HEAD of our mirror, missed in 771e6da

nathanaelhuffman · nathanaelhuffman · commit d79da5017700 · 2024-11-14T10:54:32.000-06:00
diff --git a/vnd/xpm/xpm_vhdl b/vnd/xpm/xpm_vhdl
@@ -1 +1 @@
-Subproject commit 67e2fd08d4273506854a1847f3fda51b1462b3fd
+Subproject commit dc506d10283ec6353889ca0dbd5788e5f8610351
