fix(CI): Install composer dependencies of Talk

[nickvergessen]

• Resolves: N/A

Summary

Ref nextcloud/spreed#8578
Found in #36310 (comment)

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[ChristophWurst]

🙏

[danxuliu]

CI is not happy:

+ composer install --no-dev
/bin/sh: composer: not found

[ChristophWurst]

you can also use ci as prefix for conventional commits. tools that generate changelogs would then hide the commit. a fix would be listed as a fix on the product. end of nitpick.

[nickvergessen]

So, we are green and good again :)