docs: Add sha256 sums for the 10.2.9 release

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
diff --git a/docs/relnotes/10.2.9.html b/docs/relnotes/10.2.9.html
index 85f2f71..7a9f639 100644
--- a/docs/relnotes/10.2.9.html
+++ b/docs/relnotes/10.2.9.html
@@ -31,7 +31,9 @@
 
 <h2>SHA256 checksums</h2>
 <pre>
-TBD
+f8d62857eed8f604a57710c58a8ffcfb8dab2dc4977ec27c956c7c4fd14032f6  MesaLib-10.2.9.tar.gz
+f6031f8b7113a92325b60635c504c510490eebb2e707119bbff7bd86aa34657d  MesaLib-10.2.9.tar.bz2
+11c0ef4f3308fc29d9f15a77fd8f4842a946fce9e830250a1c95b171a446171a  MesaLib-10.2.9.zip
 </pre>
 
 <h2>New features</h2>