Merge pull request buildkite-plugins#160 from buildkite-plugins/renovate/shellcheck-1.x

Update buildkite plugin shellcheck to v1.2.0

Author: pzeballos

.buildkite/pipeline.yml

@@ -13,5 +13,5 @@ steps:
         id: junit-annotate
   - label: ":bash: Shellcheck"
     plugins:
-      shellcheck#v1.1.2:
+      shellcheck#v1.2.0:
         files: hooks/*