[release-notes] developer: markup and fix typo

[Link Dupont <link src gnome org>]

commit d27e21e4212309ba2adf90b7771286473f536a61
Author: Link Dupont <link sub-pop net>
Date:   Wed Sep 8 21:36:19 2021 -0400

    developer: markup and fix typo

 help/C/developers.page | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/help/C/developers.page b/help/C/developers.page
index 9c878e62..4da9b7d8 100644
--- a/help/C/developers.page
+++ b/help/C/developers.page
@@ -125,18 +125,18 @@
     easier to find and access, and has a new search UI, which makes it easy to
     specify queries and browse results across a project.</p>
     
-    <p>Builder can now build and run CMake projects, and it can also build 
+    <p><app>Builder</app> can now build and run CMake projects, and it can also build 
     projects that use a pure Make build setup in a Flatpak environment (thanks
     to being able to handle <cmd>make-args</cmd> and
-    <cmd>make-install-args</cmd>.</p>
+    <cmd>make-install-args</cmd>).</p>
 
-    <p>Builder has had the ability to build and deploy Flatpak bundles to 
+    <p><app>Builder</app> has had the ability to build and deploy Flatpak bundles to 
     connected devices for some time, which is useful when developing mobile 
     applications. With GNOME 41, this feature has been improved, and works 
     much more automatically. To learn how to use it, see 
     <link href="https://www.jwestman.net/2021/08/06/tutorial-mobile-dev-with-builder.html";>James Westman's 
tutorial</link>.</p>
     
-    <p>Finally, Builder has a new markdown renderer for GNOME 41, which produces
+    <p>Finally, <app>Builder</app> has a new markdown renderer for GNOME 41, which produces
     much better-formatted Markdown previews.</p>
 
   </section>