README gives incorrect default report directory

[dbwiddis]

Could not set unknown property 'reportDir'

diff-coverage-gradle/README.md

Line 168 in 502a2b4

reportDir = 'dir/to/store/reports' // Optional. Default 'build/reports/jacoco/diffCoverage'

Seems the correct property is baseReportDir and the default ends with jacoco (it appends the diffCoverage subdirectory to the base path).

[SurpSG]

Done, thank you!