Bump com.influxdb:influxdb-client-java in /modules/influxdb

Bumps [com.influxdb:influxdb-client-java](https://github.com/influxdata/influxdb-client-java) from 6.7.0 to 6.8.0.
- [Release notes](https://github.com/influxdata/influxdb-client-java/releases)
- [Changelog](https://github.com/influxdata/influxdb-client-java/blob/master/CHANGELOG.md)
- [Commits](influxdata/influxdb-client-java@v6.7.0...v6.8.0)

---
updated-dependencies:
- dependency-name: com.influxdb:influxdb-client-java
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

modules/influxdb/build.gradle

@@ -7,5 +7,5 @@ dependencies {
 
     testImplementation 'org.assertj:assertj-core:3.24.2'
     testImplementation 'org.influxdb:influxdb-java:2.23'
-    testImplementation "com.influxdb:influxdb-client-java:6.7.0"
+    testImplementation "com.influxdb:influxdb-client-java:6.8.0"
 }