[release-notes] Add notes for Boxes, Terminal, and Photos

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 2c9df77389cd6da19ab5fe78762c7b8fe24f914c
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Wed Sep 2 17:31:35 2020 -0500

    Add notes for Boxes, Terminal, and Photos

 help/C/developers.page | 14 +++++++++++---
 help/C/index.page      |  5 ++++-
 2 files changed, 15 insertions(+), 4 deletions(-)
---
diff --git a/help/C/developers.page b/help/C/developers.page
index 0f0e1a9d..a0d171ad 100644
--- a/help/C/developers.page
+++ b/help/C/developers.page
@@ -26,10 +26,18 @@
   <p>GNOME &gnomeversion; includes many new features and improvements for those
   working with GNOME technologies. Read on for more details!</p>
 
-  <section id="">
-    <title></title>
+  <section id="boxes">
+    <title>Boxes</title>
     <media its:translate="no" type="image" src="figures/placeholder.png"/>
-    <p></p>
+    <p>Boxes is GNOME's application for managing virtual machines and remote
+    desktop connections. When creating a new virtual machine, Boxes
+    now allows users to manually select the operating system if it fails to do
+    so automatically, rather than falling back to the default “Unknown” virtual
+    machine profile. This improves support for operating systems that are
+    incompatible with the default profile.</p>
+
+    <p>Boxes now allows editing a virtual machine’s libvirt XML, to allow
+    changing advanced settings that are not available in the user interface.</p>
   </section>
 
   <section>
diff --git a/help/C/index.page b/help/C/index.page
index 1f219856..d4deb796 100644
--- a/help/C/index.page
+++ b/help/C/index.page
@@ -82,7 +82,10 @@
     <p>As usual, there are also many other smaller improvements in this GNOME
     release. Here are some of them!</p>
     <list>
-      <item><p></p></item>
+      <item><p>Terminal now uses an updated text color scheme, which looks
+      better and is easier to read thanks to improved color contrast.</p></item>
+      <item><p>Photos has gained a new image filter, Trencin, which is similar
+      to Instagram’s Clarendon filter.</p>/</item>
     </list>
   </section>