Send Slack message CI step failure

[obulat]

Description

When the PR has quotes in it, the Send Slack message CI step fails because of invalid JSON. Changing the title and re-running does not fix the problem because the old invalid title is re-used.

Reproduction

See https://github.com/WordPress/openverse/actions/runs/7841858042/job/21399038852?pr=3779

Additional context

Medium priority because it affects the CI status for PRs, but does not prevent us from merging them (the check is not mandatory).

[AetherUnbound]

That's frustrating, #3705 was supposed to address this 😞

[dhruvkb]

I think the safest approach here would be to have a Bash (or Python) step before the Slack steps that sanitises the PR title from the env var and writes back to the env var. We could also just strip away any quotes in the title altogether, which will lead to slightly incorrect but still readable Slack notifications.

Does this^ seem like a solution worth exploring?

[AetherUnbound]

That sounds like a good approach Dhruv! Trying to figure out the appropriate escaping for this is quite the headache.