Increase the publish task timeout

The overall release pipelinerun timeout is set to 1h30', however the
default timeout for individual taskruns is 60', which is causing
releases to fail. Increase the timeout to 1h20' for the
publish-images task within the release pipeline to avoid failure.

Signed-off-by: Andrea Frittoli <andrea.frittoli@uk.ibm.com>

tekton/release-pipeline.yaml

@@ -169,6 +169,7 @@ spec:
           subpath: bucket
         - name: release-secret
           workspace: release-secret
+      timeout: 1h20m
     - name: publish-to-bucket
       runAfter: [publish-images]
       taskRef: