docs: add news item and link release notes for mesa 10.4.7

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
diff --git a/docs/relnotes.html b/docs/relnotes.html
index 9a9c0ba..023f7dd8 100644
--- a/docs/relnotes.html
+++ b/docs/relnotes.html
@@ -21,6 +21,7 @@
 </p>
 
 <ul>
+<li><a href="relnotes/10.4.7.html">10.4.7 release notes</a>
 <li><a href="relnotes/10.5.1.html">10.5.1 release notes</a>
 <li><a href="relnotes/10.5.0.html">10.5.0 release notes</a>
 <li><a href="relnotes/10.4.6.html">10.4.6 release notes</a>