Bump flask-cors from 3.0.3 to 3.0.9 in /v3.4_to_v5.0/sql_etl

Bumps [flask-cors](https://github.com/corydolphin/flask-cors) from 3.0.3 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@3.0.3...3.0.9)

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

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

v3.4_to_v5.0/sql_etl/requirements.txt

@@ -4,7 +4,7 @@ configparser==3.5.0
 contextlib2==0.5.5
 cycler==0.10.0
 decorator==4.1.2
-Flask-Cors==3.0.3
+Flask-Cors==3.0.9
 functools32==3.2.3.post2
 logutils==0.3.3
 MarkupSafe==1.0