chore(updatecli) update powershell to generate valid updatecli manifest for version 0.49.x

[dduportal]

This PR only updates the updatecli manifest: the associated Jenkins build will be canceled (as updatecli runs in GH actions).

It fixes the WARNING messages below due to outdated syntax for the generated updatecli manifests:

WARNING: The `pullrequests` keyword is deprecated in favor of `actions`, please update this manifest. Updatecli will continue the execution while trying to translate `pullrequests` to `actions`.
WARNING: The kind "github" for actions is deprecated in favor of 'github/pullrequest'

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