docs: add sha256 checksums for 11.0.4

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
diff --git a/docs/relnotes/11.0.4.html b/docs/relnotes/11.0.4.html
index 6359434..a777b9d 100644
--- a/docs/relnotes/11.0.4.html
+++ b/docs/relnotes/11.0.4.html
@@ -31,7 +31,8 @@
 
 <h2>SHA256 checksums</h2>
 <pre>
-TBD
+ed412ca6a46d1bd055120e5c12806c15419ae8c4dd6d3f6ea20a83091d5c78bf  mesa-11.0.4.tar.gz
+40201bf7fc6fa12a6d9edfe870b41eb4dd6669154e3c42c48a96f70805f5483d  mesa-11.0.4.tar.xz
 </pre>