Error default value 'full', should be 'all'

[cocktail828]

https://github.com/dgraph-io/benchmarks/blob/8ed23af58e6d5f3e4cd1b3ea0517653ce4200ccd/cachebench/ristretto/bench.go#L48

	flagSuite = flag.String(
		"suite",
		"all",
		`You can chose from the following options:
		"all"   - hit ratio and speed performance
		"hits"  - hit ratio
		"speed" - throughput
		`,
	)

[github-actions[bot]]

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