docs: Mark off ARB_sample_shading; minor tidyup.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
diff --git a/docs/relnotes/10.0.html b/docs/relnotes/10.0.html
index 5ff5339..b74d03d 100644
--- a/docs/relnotes/10.0.html
+++ b/docs/relnotes/10.0.html
@@ -50,6 +50,7 @@
 <li>GL_ARB_texture_query_levels on i965.</li>
 <li>GL_ARB_texture_mirror_clamp_to_edge.</li>
 <li>GL_ARB_transform_feedback2, GL_ARB_transform_feedback3, and GL_ARB_transform_feedback_instanced on i965/Gen7 (with appropriate kernel support).</li>
+<li>GL_ARB_sample_shading on i965.</li>
 <li>GL_KHR_debug</li>
 </ul>