use latest main on SPIRV-Tools with original remote

AnastaZIuk · AnastaZIuk · commit 2fd8cc3d49cf · 2023-09-12T12:48:35.000+02:00
diff --git a/external/SPIRV-Tools b/external/SPIRV-Tools
@@ -1 +1 @@
-Subproject commit 4e0b94ed7aa8c4b8f7a852f32d0e17d1e1d1c11d
+Subproject commit 40f5bf59c6acb4754a0bffd3c53a715732883a12
