recruiter-responder: bump image_tag to 189ef901

OpenClaw can now answer 'what do we know about <company>?' from cache
via the new recruiter_company_research tool, and recruiter_get embeds
the cached research payload inline.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

stacks/recruiter-responder/terragrunt.hcl

@@ -19,5 +19,5 @@ dependency "external-secrets" {
 
 inputs = {
   # Override per-deploy in CI / commit.
-  image_tag = "f3cb91ff"
+  image_tag = "189ef901"
 }