[release-notes] Add more details about builder rust support

[Matthias Clasen <matthiasc src gnome org>]

commit 7bacd6a2c0cbcef8e9e208e04a01e19c961edca4
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Sep 3 14:07:50 2020 -0400

    Add more details about builder rust support

 help/C/developers.page | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/help/C/developers.page b/help/C/developers.page
index c45d2d5e..7d8ae5ae 100644
--- a/help/C/developers.page
+++ b/help/C/developers.page
@@ -51,7 +51,8 @@
 
   <section>
     <title>Builder</title>
-    <p>GNOME Builder has a new Rust language server backend.</p>
+    <p>The Rust support in GNOME Builder is now using rust-analyzer instead
+    of rls.</p>
   </section>
 
   <section>