docs: update calendar, add news and link release notes to 17.3.4

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
diff --git a/docs/relnotes.html b/docs/relnotes.html
index 94ed614..6c59782 100644
--- a/docs/relnotes.html
+++ b/docs/relnotes.html
@@ -21,6 +21,7 @@
 </p>
 
 <ul>
+<li><a href="relnotes/17.3.4.html">17.3.4 release notes</a>
 <li><a href="relnotes/17.3.2.html">17.3.3 release notes</a>
 <li><a href="relnotes/17.3.2.html">17.3.2 release notes</a>
 <li><a href="relnotes/17.2.8.html">17.2.8 release notes</a>