More missing tokens

[heyx3]

GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS = 0x90EB

(going to dump more here if I find any, hopefully get to adding them later)

[heyx3]

GL_COMPUTE_WORK_GROUP_SIZE = 0x8267 is a weird one. This constant is already defined in ModernGL as GL_COMPUTE_LOCAL_WORK_SIZE, and I can find uses of both on the internet, but more for the former than the latter.

And I can only find the former on this list, not the latter: https://raw.githubusercontent.com/KhronosGroup/OpenGL-Registry/master/xml/gl.xml