docs: Add sha256 sums for the 10.3.7 release

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
diff --git a/docs/relnotes/10.3.7.html b/docs/relnotes/10.3.7.html
index d01b9e9..10302cf 100644
--- a/docs/relnotes/10.3.7.html
+++ b/docs/relnotes/10.3.7.html
@@ -30,7 +30,9 @@
 
 <h2>SHA256 checksums</h2>
 <pre>
-TBD
+bc13f33c19bc9f44a0565fdd51a8f9d1c0153a3365c429ceaf4ef43b7022b052  MesaLib-10.3.7.tar.gz
+43c6ced15e237cbb21b3082d7c0b42777c50c1f731d0d4b5efb5231063fb6a5b  MesaLib-10.3.7.tar.bz2
+d821fd46baf804fecfcf403e901800a4b996c7dd1c83f20a354b46566a49026f  MesaLib-10.3.7.zip
 </pre>
 
 <h2>New features</h2>