docs: add release notes for 11.0.6
docs: add release notes for 11.0.6

Signed-off-by: Emil Velikov <f20878473f414da183da19ee25c8722cc1d711e4@collabora.com>
(cherry picked from commit 04fd3a6f629b5098cc2a4da1f2392678349ecf56)

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler