Better handling of missing issue ids

[neil-morrison44]

Hi,

I've got a situation where some PRs will be linked to JIRA issues and some won't, which I imagine is fairly common.
However because the find-issue-key errors when the input doesn't have a JIRA issue (at least when using the string input mode) my whole workflow fails.

Ideally the output is just set to '', this could be via a new parameter like optional: true to not effect any current users who rely on the failure.

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Also are these actions maintained anymore? I'd like to keep using the "verified as Atlassian" actions but there doesn't seem to have been anything done since late 2020.

[Justin-JHG]

What I did is

name: 🔸 Find issue key in commit messages
continue-on-error: true
uses: atlassian/gajira-find-issue-key@master
id: jira