chore: add 0.6 series to CAPI metadata

This should fix the installation process.

Signed-off-by: Andrey Smirnov <[email protected]>

Author: smira

config/metadata/metadata.yaml

@@ -13,3 +13,6 @@ releaseSeries:
 - major: 0
   minor: 5
   contract: v1beta1
+- major: 0
+  minor: 6
+  contract: v1beta1