Excavator: Upgrade failure-reports plugin (#1194)

Author: svc-excavator-bot

build.gradle

@@ -9,7 +9,7 @@ buildscript {
         classpath 'com.palantir.gradle.jdks:gradle-jdks:0.69.0'
         classpath 'com.palantir.gradle.jdkslatest:gradle-jdks-latest:0.21.0'
         classpath 'com.palantir.gradle.externalpublish:gradle-external-publish-plugin:1.24.0'
-        classpath 'com.palantir.gradle.failure-reports:gradle-failure-reports:1.14.0'
+        classpath 'com.palantir.gradle.failure-reports:gradle-failure-reports:1.15.0'
         classpath 'com.palantir.gradle.idea-configuration:gradle-idea-configuration:0.5.0'
         classpath 'com.palantir.baseline:gradle-baseline-java:6.54.0'
         classpath 'com.palantir.gradle.consistentversions:gradle-consistent-versions:3.2.0'