chore(deps-dev): update importlib-metadata requirement in /unicorn_web

Updates the requirements on [importlib-metadata](https://github.com/python/importlib_metadata) to permit the latest version.
- [Release notes](https://github.com/python/importlib_metadata/releases)
- [Changelog](https://github.com/python/importlib_metadata/blob/main/NEWS.rst)
- [Commits](python/importlib_metadata@v8.7.1...v9.0.0)

---
updated-dependencies:
- dependency-name: importlib-metadata
  dependency-version: 9.0.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

unicorn_web/pyproject.toml

@@ -20,7 +20,7 @@ dependencies = [
 dev = [
     "aws-lambda-powertools[all]>=3.25.0",
     "moto[dynamodb,events,sqs]>=5.1.22",
-    "importlib-metadata>=8.7.1",
+    "importlib-metadata>=9.0.0",
     "pyyaml>=6.0.3",
     "arnparse>=0.0.2",
     "pytest>=9.0.2",