Use HTTPS for Mapquest

Warning message in Flask: 

```
cbl-web-tool/flask-app/myenv/lib/python3.11/site-packages/urllib3/connectionpool.py:1099: InsecureRequestWarning: Unverified HTTPS request is being made to host 'www.mapquestapi.com'. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#tls-warnings
```