build(deps): update importlib-metadata requirement from <8.6.0 to <8.7.0

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@0.1...v8.6.1)

---
updated-dependencies:
- dependency-name: importlib-metadata
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -55,7 +55,7 @@ dependencies = [
   "django-widget-tweaks>=1.5,<2.0",
   "djangorestframework>=3.15,<4.0",
   "drf-extensions>=0.7.1,<1.0",
-  "importlib_metadata<8.6.0",  # upstrem problem, see https://github.com/python/importlib_metadata/issues/506
+  "importlib_metadata<8.7.0",  # upstrem problem, see https://github.com/python/importlib_metadata/issues/506
   "iso8601>=2.0,<3.0",
   "markdown>=3.4,<4.0",
   "packaging>=23.2,<25.0",