Bump com.github.jk1:gradle-license-report from 2.1 to 2.8

Bumps com.github.jk1:gradle-license-report from 2.1 to 2.8.

---
updated-dependencies:
- dependency-name: com.github.jk1:gradle-license-report
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle

@@ -6,7 +6,7 @@ import com.github.jk1.license.render.TextReportRenderer
 
 buildscript {
     dependencies {
-        classpath 'com.github.jk1:gradle-license-report:2.1'
+        classpath 'com.github.jk1:gradle-license-report:2.8'
     }
 }