script: Rename CanGc::note() to CanGc::deprecated_note() (#44081)

Per the suggestion in

https://servo.zulipchat.com/#narrow/channel/263398-general/topic/PSA.3A.20avoid.20new.20usages.20of.20CanGc.20whenever.20possible/near/583995807
to mark this method as deprecated and make clear it shouldn't be used
anymore, as alternatives exist.

Part of #40600

Testing: It compiles

Signed-off-by: Tim van der Lippe <tvanderlippe@gmail.com>

components/script/dom/node/node.rs

@@ -1583,7 +1583,7 @@ impl Node {
         Ok(NodeList::new_simple_list(
             &self.owner_window(),
             iter,
-            CanGc::note(),
+            CanGc::deprecated_note(),
         ))
     }
 
@@ -1857,7 +1857,7 @@ impl Node {
         if let Some(node) = self.downcast::<HTMLStyleElement>() {
             node.get_cssom_stylesheet()
         } else if let Some(node) = self.downcast::<HTMLLinkElement>() {
-            node.get_cssom_stylesheet(CanGc::note())
+            node.get_cssom_stylesheet(CanGc::deprecated_note())
         } else {
             None
         }