doc: update the Developers guide to mention a thing better.

doc/developers.dox

@@ -903,8 +903,13 @@ inverse.
     -   add a temporary <tt>\@<b></b>anchor changelog-latest</tt> (and
         equivalent in other repos) on top so the links from main page work
         properly
-8.  Convert all occurences of <tt>\@m_since_latest</tt> to
+8.  Convert all occurences of
-    <tt>\@m_since{20XY,ab}</tt>
+    -   <tt>\@m_since_latest_{thing}</tt> to <tt>\@m_since_{thing,20XY,ab}</tt>
+    -   <tt>\@m_since_latest</tt> to <tt>\@m_since{20XY,ab}</tt>
+    -   <tt>\@m_deprecated_since_latest_{thing}</tt> to
+        <tt>\@m_deprecated_since_{thing,20XY,ab}</tt>
+    -   <tt>\@m_deprecated_since_latest</tt> to
+        <tt>\@m_deprecated_since{20XY,ab}</tt>
 9.  Bump `MAGNUM*_LIBRARY_VERSION`, `MAGNUM*_LIBRARY_SOVERSION`
     `MAGNUM*_VERSION_YEAR` and `MAGNUM*_VERSION_MONTH` in all projects. Ensure
     all projects have the exact same version.