Obsolete information about versions (see version-matrix)

[george0st]

Obsolete information about versions (see version-matrix):

• https://github.com/mlrun/ce/blob/development/charts/mlrun-ce/README.md#version-matrix
• you can see MLRun CE 0.6.3, MLRun 1.6.4, ...

Proposal:

• it makes sense update the version-matrix or remove this section