Bump flask-cors in /src/Diagnostics.AIProjects/SearchAPI

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)

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

Author: dependabot[bot]

src/Diagnostics.AIProjects/SearchAPI/requirements.txt

@@ -1,5 +1,5 @@
 Flask==1.1.1
-flask_cors==3.0.7
+flask_cors==3.0.9
 nltk==3.4
 gensim==3.7.2
 requests==2.18.4