build(deps): Update gunicorn requirement (#1580)

Updates the requirements on [gunicorn](https://github.com/benoitc/gunicorn) to permit the latest version.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@23.0.0...26.0.0)

---
updated-dependencies:
- dependency-name: gunicorn
  dependency-version: 26.0.0
  dependency-type: direct:production
...

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Author: dependabot[bot]

pyproject.toml

@@ -62,7 +62,7 @@ dependencies = [
     "mock>=5.2.0,<6.0.0",
 
     # Production Server
-    "gunicorn>=23.0.0,<26.0.0",
+    "gunicorn>=23.0.0,<27.0.0",
 
     # Monitoring & Logging
     "sentry-sdk>=2.32.0,<3.0.0",