Fix copy public url in CHC

[joanagmaia]

Changes proposed ✍️

Task: Copy public URL for published conversations not working

Steps to reproduce:

1. Community Help Center: When clicking on "Copy public URL" in published conversations, nothing happens
2. In the console, an error is being thrown: Cannot read properties of undefined (reading 'slug')

Fix:

• The slug was being used from an inexistent record. Get the slug from the conversation passed in the component

• Screenshots (front-end changes only)

Checklist ✅

• Label appropriately with type:feature 🚀, type:enhancement ✨, type:bug 🐞, or type:documentation 📜.
• Tests are passing.
• New backend functionality has been unit-tested.
• Environment variables have been updated
  • Front-end: frontend/.env.dist
  • Backend: backend/.env.dist, backend/.env.dist.staging, backend/.env.dist.staging.
  • Configuration docs have been updated.
  • Team members only: update environment variables in Password manager and update the team
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.
• All changes have been tested in a staging site.
• All changes are working locally running crowd.dev's Docker local environment.

[netlify]

❌ Deploy Preview for open-crowd-prod failed.

Name	Link
🔨 Latest commit	7e53e7f
🔍 Latest deploy log	https://app.netlify.com/sites/open-crowd-prod/deploys/636917d8f51b890009094c1b

[netlify]

❌ Deploy Preview for open-devfounders failed.

Name	Link
🔨 Latest commit	7e53e7f
🔍 Latest deploy log	https://app.netlify.com/sites/open-devfounders/deploys/636917d8fee7ab0009db7377

[mariobalca]

Thanks for fixing this! Will merge 👍