docs: add sha256 checksums for 11.1.2
docs: add sha256 checksums for 11.1.2

Signed-off-by: Emil Velikov <f20878473f414da183da19ee25c8722cc1d711e4@collabora.com>
(cherry picked from commit e49dd21bcbabdb330620d48f5915828cfd5eb983)

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler