open-pr: gracefully handle when an actor has no public email address

It is quite common for users not to publish their email addresses in
their GitHub profile, which is totally okay, and we should just deal
with this in an elegant way.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.github/workflows/open-pr.yml

@@ -126,7 +126,7 @@ jobs:
             )
             core.setOutput('login', answer.login)
             core.setOutput('name', answer.name)
-            core.setOutput('email', answer.email)
+            core.setOutput('email', answer.email || `${process.env.ACTOR}@users.noreply.github.com`)
       - name: Configure build
         shell: bash
         run: |