Bump approvaltests from 15.3.2 to 16.0.0

Bumps [approvaltests](https://github.com/approvals/ApprovalTests.Python) from 15.3.2 to 16.0.0.
- [Release notes](https://github.com/approvals/ApprovalTests.Python/releases)
- [Commits](approvals/ApprovalTests.Python@v15.3.2...v16.0.0)

---
updated-dependencies:
- dependency-name: approvaltests
  dependency-version: 16.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Browser/dev-requirements.txt

@@ -9,7 +9,7 @@ robotframework-pabot >= 5.1.0
 twine >= 6.2.0
 robotstatuschecker >= 4.1.1
 rellu >= 2.0.0
-approvaltests == 15.3.2
+approvaltests == 16.0.0
 pytest-mock==3.15.1
 Pillow==12.0.0
 # Required for injecting google analytics tags on release