update xsimd to 12.1.1

tomjnixon · tomjnixon · commit 720fe69d3dc5 · 2024-01-26T11:57:50.000Z
diff --git a/submodules/xsimd b/submodules/xsimd
@@ -1 +1 @@
-Subproject commit 31298c883bda0f3dfcf44170f45be242deb78f1a
+Subproject commit c1247bffa8fc36de7380a5cd42673a3b32f74c97
