Update Sizzle: fixes an issue with an escape character in the id of a context

diff --git a/src/sizzle b/src/sizzle
index c96442b988d9258bcc5e973a8b047fbcb90a81ee..6ed5a849f8437d2903d66927151bed6f3e5f3915 160000 (submodule)
--- a/src/sizzle
+++ b/src/sizzle
@@ -1 +1 @@
-Subproject commit c96442b988d9258bcc5e973a8b047fbcb90a81ee
+Subproject commit 6ed5a849f8437d2903d66927151bed6f3e5f3915