chore(deps): bump playwright from 1.59.0 to 1.61.0 in /backend

Bumps [playwright](https://github.com/microsoft/playwright-python) from 1.59.0 to 1.61.0.
- [Release notes](https://github.com/microsoft/playwright-python/releases)
- [Commits](https://github.com/microsoft/playwright-python/compare/v1.59.0...v1.61.0)

---
updated-dependencies:
- dependency-name: playwright
  dependency-version: 1.61.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

backend/pyproject.toml

@@ -18,7 +18,7 @@ dependencies = [
     "fastapi==0.136.3",
     "feedparser==6.0.10",
     "httpx==0.28.1",
-    "playwright==1.59.0",
+    "playwright==1.61.0",
     "playwright-stealth==1.0.6",
     "pydantic==2.13.3",
     "pydantic-settings==2.8.1",