update the stdsimd submodule

to bring in the doc generation fix

diff --git a/src/stdsimd b/src/stdsimd
index b9de11ab43090c71ff7ab159a479394df1f968ab..05c2f61c384e2097a3a4c648344114fc4ac983be 160000 (submodule)
--- a/src/stdsimd
+++ b/src/stdsimd
@@ -1 +1 @@
-Subproject commit b9de11ab43090c71ff7ab159a479394df1f968ab
+Subproject commit 05c2f61c384e2097a3a4c648344114fc4ac983be