chore: add README section on how to test components based on PRs

Signed-off-by: Adrian Riobo <[email protected]>

README.md

@@ -22,4 +22,18 @@ git tag crc-builder-v1.0.0
 # Here the gh builder flow for the ci action will create oci image and bundle with tekton tasks
 git push upstream crc-builder-v1.0.0
 # Change version on release-info to next version 
-```
+```
+
+## testing PRs
+
+Manually run make XXX-tkn-create, then;
+
+Typically PRs will be composed of images, tasks and pipelines:
+
+* Pipelines and tasks can use git resolver using the forked repo source for the PR
+* Task which needs the image need to be updated with the ghcr image
+
+A testing commit can be done at very last part of the PR to test this customizations which then can be used 
+from a pipelinerun with a pipelineref to the forked repo source for the pr.
+
+If everything works just revert and dismiss latest commit and create a tag