Bump elasticsearch-dsl from 0.1.8 to 0.1.9 (#13419)

Bumps [elasticsearch-dsl](https://github.com/elasticsearch/elasticsearch-ruby) from 0.1.8 to 0.1.9.
- [Release notes](https://github.com/elasticsearch/elasticsearch-ruby/releases)
- [Changelog](https://github.com/elastic/elasticsearch-ruby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/elasticsearch/elasticsearch-ruby/compare/v0.1.8...v0.1.9)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Gemfile.lock

@@ -207,7 +207,7 @@ GEM
       elasticsearch-transport (= 7.5.0)
     elasticsearch-api (7.5.0)
       multi_json
-    elasticsearch-dsl (0.1.8)
+    elasticsearch-dsl (0.1.9)
     elasticsearch-transport (7.5.0)
       faraday (>= 0.14, < 1)
       multi_json