Update README.md - describe used images

Author: masayag

README.md

@@ -31,6 +31,17 @@ Edit the workflow, add schema and spec files and run it locally from project's f
 ```bash
 kn-workflow quarkus run
 ```
+## Workflow images
+For running the workflow locally (with `kn-workflow run`), the following image is pulled:
+```
+registry.redhat.io/openshift-serverless-1/logic-swf-devmode-rhel8:1.35.0
+```
+
+For building the workflow image, the following images are pulled:
+```
+registry.redhat.io/openshift-serverless-1/logic-swf-builder-rhel8@sha256:5590b799420769ee2fe316bc0425bec10f7a29433765244702a23348150e621e
+registry.access.redhat.com/ubi9/openjdk-17:1.21-2
+```
 
 ## References
 
@@ -39,4 +50,4 @@ kn-workflow quarkus run
 * OpenShift Serverless Logic: https://openshift-knative.github.io/docs/docs/latest/serverless-logic/about.html
 * Using Quarkus: https://docs.redhat.com/en/documentation/red_hat_build_of_quarkus/3.15/html/getting_started_with_red_hat_build_of_quarkus/assembly_quarkus-getting-started_quarkus-getting-started#proc_online-maven_quarkus-getting-started
 Static token in RHDH/Backstage for the notification plugin: https://backstage.io/docs/auth/service-to-service-auth/#static-tokens
-* RHDH configuration if running behind a proxy: https://docs.redhat.com/en/documentation/red_hat_developer_hub/1.4/html/configuring/running-behind-a-proxy#running-behind-a-proxy 
+* RHDH configuration if running behind a proxy: https://docs.redhat.com/en/documentation/red_hat_developer_hub/1.4/html/configuring/running-behind-a-proxy#running-behind-a-proxy