Increase timeout of docker release job

This is coming in right around the 1 hour mark.  Update it to match
the check/gate image build jobs.

Change-Id: I753172d44e0be5662042b508b0ab6db531f730e4

.zuul.yaml

@@ -157,7 +157,7 @@
     name: nodepool-build-image
     parent: opendev-build-docker-image
     description: Build Docker images.
-    timeout: 4800
+    timeout: &image_build_timeout 4800
     dependencies:
       - opendev-buildset-registry
     requires:
@@ -195,7 +195,7 @@
     name: nodepool-upload-image
     parent: opendev-upload-docker-image
     description: Build Docker images and upload to Docker Hub.
-    timeout: 4800
+    timeout: *image_build_timeout
     requires:
       - python-builder-3.8-container-image
       - python-base-3.8-container-image
@@ -420,6 +420,7 @@
         - opendev-release-python
         - zuul-publish-tox-docs
         - upload-docker-image:
+            timeout: *image_build_timeout
             secrets:
               name: docker_credentials
               secret: nodepool-dockerhub