Bump bootstrap from 3.4.1 to 5.0.2 in /searx/static/themes/oscar

Bumps [bootstrap](https://github.com/twbs/bootstrap) from 3.4.1 to 5.0.2.
- [Release notes](https://github.com/twbs/bootstrap/releases)
- [Commits](https://github.com/twbs/bootstrap/compare/v3.4.1...v5.0.2)

---
updated-dependencies:
- dependency-name: bootstrap
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

searx/static/themes/oscar/package.json

@@ -13,7 +13,7 @@
         "less-plugin-clean-css": "^1.5.1"
     },
     "dependencies": {
-        "bootstrap": "^3.4.1",
+        "bootstrap": "^5.0.2",
         "corejs-typeahead": "^1.3.1",
         "jquery": "^3.6.0",
         "leaflet": "^1.7.1"