Bump telegraf from 2.1.0 to 2.1.1

Bumps [telegraf](https://github.com/jgraichen/telegraf-ruby) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/jgraichen/telegraf-ruby/releases)
- [Changelog](https://github.com/jgraichen/telegraf-ruby/blob/main/CHANGELOG.md)
- [Commits](https://github.com/jgraichen/telegraf-ruby/compare/v2.1.0...v2.1.1)

---
updated-dependencies:
- dependency-name: telegraf
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -501,7 +501,7 @@ GEM
       sprockets (>= 3.0.0)
     ssrf_filter (1.0.8)
     strscan (3.0.4)
-    telegraf (2.1.0)
+    telegraf (2.1.1)
       influxdb
     temple (0.8.2)
     thor (1.2.1)