docs: add sha256 checksums for 10.6.4
docs: add sha256 checksums for 10.6.4

Signed-off-by: Emil Velikov <4c996f2f093ddd0585a556460b4cc3ba555546ef@gmail.com>
(cherry picked from commit 99793e2541510fe208d29e69fedf97a6fff006f8)

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler