Bump influxdb-client from 2.6.0 to 2.9.0

Bumps [influxdb-client](https://github.com/influxdata/influxdb-client-ruby) from 2.6.0 to 2.9.0.
- [Release notes](https://github.com/influxdata/influxdb-client-ruby/releases)
- [Changelog](https://github.com/influxdata/influxdb-client-ruby/blob/master/CHANGELOG.md)
- [Commits](influxdata/influxdb-client-ruby@v2.6.0...v2.9.0)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -20,7 +20,7 @@ GEM
     faraday-net_http (2.0.3)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
-    influxdb-client (2.6.0)
+    influxdb-client (2.9.0)
     minitest (5.17.0)
     octokit (4.25.0)
       faraday (>= 1, < 3)