Fix compatibility matrix

Author: mbohlool

README.md

@@ -87,7 +87,7 @@ supported versions of Kubernetes clusters.
 |--------------------|----------------|----------------|----------------|----------------|----------------|
 | client-python 1.0  | +              | ✓              | -              | -              |-               |
 | client-python 2.0  | +              | +              | ✓              | -              |-               |
-| client-python 3.0  | +              | +              | +              | ✓              |✓               |
+| client-python 3.0  | +              | +              | +              | ✓              |-               |
 | client-python 4.0  | +              | +              | +              | +              |✓               |
 | client-python HEAD | +              | +              | +              | +              |✓               |