[roll] Roll fuchsia [rust-3p] Update parking_lot_core to 0.9.12

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1444268
Original-Revision: 40b4419921a1c500372bb42805c65721688070f8
GitOrigin-RevId: fa2b563d219344f2cd8bdc9e69dfa1439726e16f
Change-Id: I02259232a816a0427011dbf22b623a8db8c9b688

Author: Thomas Zander

stem

@@ -7,7 +7,7 @@
             manifest="manifests/platform"
             root=""
             remote="https://fuchsia.googlesource.com/fuchsia"
-            revision="015bdc3f222ca9766341ce7e1ad2d975bb96f00d"/>
+            revision="40b4419921a1c500372bb42805c65721688070f8"/>
   </imports>
   <projects>
     <project name="cobalt"