ibm_container_cluster doc improvements

[powellquiring]

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New or Affected Resource(s) or Datasource(s)

• ibm_container_cluster

Description

https://registry.terraform.io/providers/IBM-Cloud/ibm/latest/docs/resources/container_cluster

• [ ] The VPC example below is multi zone.
• [ ] VPC is preferred and should be the first terraform example provided.

• [ ] The use of generation generates a warning and should be removed (check the docs for other references).

Warning: Argument is deprecated
│ 
│   with provider["registry.terraform.io/ibm-cloud/ibm"],
│   on main.tf line 2, in provider "ibm":
│    2:   generation = 2
│ 
│ The generation field is deprecated and will be removed after couple of releases
╵

References

• #0000