update context path

Author: AjayJagan

.tekton/guardrails-detectors-multi-arch-poc-push.yaml

@@ -31,9 +31,9 @@ spec:
     - linux/s390x
     - linux/ppc64le
   - name: dockerfile
-    value: detectors/Dockerfile.hf
+    value: Dockerfile.hf
   - name: path-context
-    value: .
+    value: detectors
   pipelineSpec:
     description: |
       This pipeline is ideal for building multi-arch container images from a Containerfile while maintaining trust after pipeline customization.