Update drjit submodule

njroussel · njroussel · commit ffcde97708f3 · 2023-06-19T14:16:44.000+02:00
With this upgrade come the following changes:
* Fixes to `dr.switch` and `dr.dispatch`
* Fixes to operations on Quaternions
* Improvements to evaluations of dirty variables
diff --git a/ext/drjit b/ext/drjit
@@ -1 +1 @@
-Subproject commit 50532d291b2dcf3fc910fcba751d452d7cfedb78
+Subproject commit 3f661b56410c4543c08d096b9f4c6d5bb114ef04
