Upgrade: Bump flask-cors from 3.0.7 to 3.0.9 in /obs/api

Bumps [flask-cors](https://github.com/corydolphin/flask-cors) from 3.0.7 to 3.0.9.
- [Release notes](https://github.com/corydolphin/flask-cors/releases)
- [Changelog](https://github.com/corydolphin/flask-cors/blob/master/CHANGELOG.md)
- [Commits](corydolphin/flask-cors@3.0.7...3.0.9)

---
updated-dependencies:
- dependency-name: flask-cors
  dependency-type: direct:production
...

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

Author: dependabot[bot]

obs/api/requirements.txt

@@ -5,7 +5,7 @@ Werkzeug==0.16.0
 PyYAML==5.4
 Flask_Script==2.0.6
 Flask==1.0.2
-Flask_Cors==3.0.7
+Flask_Cors==3.0.9
 Flask_RESTful==0.3.7
 python-dotenv==0.10.3
 cloudianapi==0.2.4