Use bash-cache 2.12.0 with new command for generated .strings lint

Author: mokagio

.buildkite/pipeline.yml

@@ -2,7 +2,7 @@
 common_params:
   # Common plugin settings to use with the `plugins` key.
   - &common_plugins
-    - automattic/bash-cache#2.8.0
+    - automattic/bash-cache#2.12.0
     - automattic/git-s3-cache#v1.1.3:
         bucket: "a8c-repo-mirrors"
         # This is not necessarily the actual name of the repo or the GitHub organization