Update @eyeo/webext-ad-filtering-solution dependency to 1.2.2

Background / User story

We want to bring in the fix for #1578 (closed) sooner than later, because it has a substantial effect on the ad filtering quality.

Dependency changes

• Name: @eyeo/webext-ad-filtering-solution
• New version: 1.2.2
• Breaking changes: None.
• Other changes: https://jira.eyeo.com/browse/EE-304 - Fixed: Incorrect handling of first-party requests in third-party frames (see #1578 (closed)).

Integration changes

• Legal: TBD
• Development: N/A

Hints for testers

This dependency update is expected to fix #1578 (closed).