docs: Fixed Windows build for 7.7.1

(cherry picked from commit a0518e66b2)

docs/relnotes-7.7.1.html

@@ -43,6 +43,7 @@ tbd
 <li>Allocate constants more tightly in GL_ARB_vertex/fragment parser.
 <li>Fixed mipmap generation bug caused by invalid viewport state.
 <li>Gallium SSE codegen for XPD didn't always work.
+<li>Fixed Windows build.
 </ul>