Increase the publish timeout

Increase the publish timeout to 2h. The previous increase to 1h20'
was not enough and the task timedout again.

This will require the overall `PipelineRun` timeout to be increased
too.

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

Author: afrittoli

tekton/release-pipeline.yaml

@@ -169,7 +169,7 @@ spec:
           subpath: bucket
         - name: release-secret
           workspace: release-secret
-      timeout: 1h20m
+      timeout: 2h
     - name: publish-to-bucket
       runAfter: [publish-images]
       taskRef: