Bump @github/tab-container-element from 3.2.0 to 4.8.0 in /app

Bumps [@github/tab-container-element](https://github.com/github/tab-container-element) from 3.2.0 to 4.8.0.
- [Release notes](https://github.com/github/tab-container-element/releases)
- [Commits](github/tab-container-element@v3.2.0...v4.8.0)

---
updated-dependencies:
- dependency-name: "@github/tab-container-element"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

app/package.json

@@ -20,7 +20,7 @@
     },
     "dependencies": {
         "@github/details-menu-element": "^1.0.12",
-        "@github/tab-container-element": "^3.2.0",
+        "@github/tab-container-element": "^4.8.0",
         "alpinejs": "^3.12.0",
         "quicklink": "^2.3.0"
     }