docs: add sha256 checksums for 17.0.0

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
(cherry picked from commit 80b41d9899f37e58b197f55897115d2cb6e13af9)
diff --git a/docs/relnotes/17.0.0.html b/docs/relnotes/17.0.0.html
index aed746f..3822e6c 100644
--- a/docs/relnotes/17.0.0.html
+++ b/docs/relnotes/17.0.0.html
@@ -33,7 +33,8 @@
 
 <h2>SHA256 checksums</h2>
 <pre>
-TBD.
+696578f0b83796470511a88a95fff15a2a25fa201a9e487716f2ca20c177c3ab  mesa-17.0.0.tar.gz
+39db3d59700159add7f977307d12a7dfe016363e760ad82280ac4168ea668481  mesa-17.0.0.tar.xz
 </pre>