Bump requests in /workshop-2/app/like-service/service

Bumps [requests](https://github.com/psf/requests) from 1.2.3 to 2.20.0.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/master/HISTORY.md)
- [Commits](psf/requests@v1.2.3...v2.20.0)

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

workshop-2/app/like-service/service/requirements.txt

@@ -1,3 +1,3 @@
 Flask==1.0.0
 flask-cors==3.0.0
-requests==1.2.3
+requests==2.20.0