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**Description**
In result-summary.md line 73-74, the example of kernel-launch used
metrics 'kernel-launch/event_overhead' and
'kernel-launch/wall_overhead'.

But in micro-benchmarks.md line 20-21, the metric names are described as
'kernel-launch/event_time' and ' kernel-launch/wall_time'.

Solution: Use identical metric names described in micro-benchmarks.md.

https://github.com/microsoft/superbenchmark/issues/649

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: hongtaozhang <hongtaozhang@microsoft.com>
Co-authored-by: Yifan Xiong <yifan.xiong@microsoft.com>