PHP deprecations errors in 7.0.70

[jpwab]

🐛 I'm reporting a Bug 🐛

Hello,
I have upgraded from Akeneo 5, to Akeneo 6, and now to version 7.0.70.
I am now getting deprecated notices due to the PHP 8.1 update.

For example when indexing.
The classes are all from the vendor folder, do you also have these notices or did I forget something during the upgrade?

I used these two guides for the updates:
https://docs.akeneo.com/latest/migrate_pim/upgrade/upgrade_from_50_to_60.html
https://docs.akeneo.com/latest/migrate_pim/upgrade/upgrade_from_60_to_70.html
Here is a screenshot: