Update error check during VersionCheck

[DMajrekar]

Error seen

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xaaeaf7]

goroutine 1 [running]:
github.com/civo/cli/config.CivoAPIClient()
        /home/runner/work/cli/cli/config/config.go:275 +0xb7
github.com/civo/cli/config.regionsToFeature()
        /home/runner/work/cli/cli/config/config.go:238 +0x38
github.com/civo/cli/config.loadConfig({0xc000036810, 0x17})
        /home/runner/work/cli/cli/config/config.go:100 +0x41d
github.com/civo/cli/config.ReadConfig()
        /home/runner/work/cli/cli/config/config.go:53 +0x12a
github.com/civo/cli/cmd.init.1()
        /home/runner/work/cli/cli/cmd/root.go:164 +0x738

[vishalanarase]

LGTM