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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