Update dashboard.md (#399)
Update dashboard.md (#399)

Renamed `dashboard.reporType` to `dashboard.reportType`
stryker-mutator/stryker-mutator.github.io,stryker-mutator/stryker-mutator.github.io,stryker-mutator/stryker-mutator.github.io,stryker-mutator/stryker-mutator.github.io