[BUG] download_sensor.py / find sensors even if the os is invalid

[nesies]

Describe the bug
download_sensors.py find sensors to download even if the OS provided do not match

To Reproduce

$ ./download_sensor.py -o invalid-os   -v 9 -t tsv
Name                                            OS                                OS Version    Release Date                    Version
falcon-sensor-7.16.0-16903.el9.x86_64.rpm       RHEL/CentOS Stream/Oracle                  9    2024-06-11T23:09:23.885Z        7.16.16903
falcon-sensor-7.15.0-16803.el9.x86_64.rpm       RHEL/Oracle                                9    2024-05-09T22:18:56.575Z        7.15.16803
falcon-sensor-7.14.0-16703.el9.x86_64.rpm       RHEL/Oracle                                9    2024-04-17T22:38:16.904Z        7.14.16703
falcon-sensor-7.13.0-16604.el

Expected behavior
The script should find nothing and/or perhaps display "invalid OS"

Environment (please complete the following information):

• OS: RHEL 9
• Python: 3.9
• FalconPy: 1.4.4