docs/relnotes: add sha256sum for 22.3.7
diff --git a/docs/relnotes/22.3.7.rst b/docs/relnotes/22.3.7.rst
index 202fc89..e35282c2 100644
--- a/docs/relnotes/22.3.7.rst
+++ b/docs/relnotes/22.3.7.rst
@@ -19,7 +19,7 @@
 
 ::
 
-    TBD.
+    894ce2f4a1c2e76177cdd2284620192d0da3066b243eec2fbb1d7cf37f13042c  mesa-22.3.7.tar.xz
 
 
 New features