[release-notes] Add builder and sysprof in the developers page

[Matthias Clasen <matthiasc src gnome org>]

commit c8c77d3ba24caa097969148ad5d68422f3389147
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Sep 3 14:04:01 2020 -0400

    Add builder and sysprof in the developers page

 help/C/developers.page | 11 +++++++++++
 1 file changed, 11 insertions(+)
---
diff --git a/help/C/developers.page b/help/C/developers.page
index 4178306e..c45d2d5e 100644
--- a/help/C/developers.page
+++ b/help/C/developers.page
@@ -49,6 +49,17 @@
     work. XXX need a link.</p>
   </section>
 
+  <section>
+    <title>Builder</title>
+    <p>GNOME Builder has a new Rust language server backend.</p>
+  </section>
+
+  <section>
+    <title>Sysprof</title>
+    <p>Support for tracing with sysprof has been integrated in GLib, libsoup
+    and pango.</p>
+  </section>
+
   <section>
     <title>libhandy</title>
     <p>libhandy is a library providing high-quality GTK widgets with a