docs: add sha256sum for 23.1.9
diff --git a/docs/relnotes/23.1.9.rst b/docs/relnotes/23.1.9.rst
index c7ab23b..480fa94 100644
--- a/docs/relnotes/23.1.9.rst
+++ b/docs/relnotes/23.1.9.rst
@@ -19,7 +19,7 @@
 
 ::
 
-    TBD.
+    295ba27c28146ed09214e8ce79afa1659edf9d142decc3c91f804552d64f7510  mesa-23.1.9.tar.xz
 
 
 New features