release-winget/release-homebrew: surface the opened PR's URL more prominently

[dscho]

By prefixing the line with ::notice::, the result will not only be printed in the (not very long retained) job logs, but also on the summary page of the workflow run.

[dscho]

The CI failures are all due to the current Amazon Web Services outage, I believe:

Initialize containers 15s
▷ Checking docker version
▷ Clean up resources from previous jobs
▷ Create local container network
▼ Starting job container
  /usr/bin/docker pull ubuntu:rolling
  Error response from daemon: Head "https://registry-1.docker.io/v2/library/ubuntu/manifests/rolling": received unexpected HTTP status: 503 Service Unavailable
  Warning: Docker pull failed with exit code 1, back off 8.82 seconds before retry.
  /usr/bin/docker pull ubuntu:rolling
  Error response from daemon: Head "https://registry-1.docker.io/v2/library/ubuntu/manifests/rolling": received unexpected HTTP status: 503 Service Unavailable
  Warning: Docker pull failed with exit code 1, back off 4.841 seconds before retry.
  /usr/bin/docker pull ubuntu:rolling
  Error response from daemon: Head "https://registry-1.docker.io/v2/library/ubuntu/manifests/rolling": received unexpected HTTP status: 502 Bad Gateway
  Error: Docker pull failed with exit code 1