fix: bump min python for panel to 3.7

[brettpetch]

Flask-Limiter doesn't like 3.6.

Description

Fixes issues:

• Un-tracked issue...

Proposed Changes:

• Bumps min python to 3.7 for installing and updating panel to maintain compatibility with 18.04 systems.

Change Categories

• Bug fix

Checklist

• Branch was made off the develop branch and the PR is targetting the develop branch
• Docs have been made OR are not necessary
  • PR link:
• Changes to panel have been made OR are not necessary
  • PR link:
• Code conforms to project structure (See more)
• Prints to terminal are handled (See more)
• I have commented my code, particularly in hard-to-understand areas
• Testing was done
  • Tests created or no new tests necessary
  • Tests executed

Test scenarios

Architectures

	amd64	armhf	arm64	Unspecified
Jammy
Focal
Bookworm
Bullseye
Buster
Raspbian	⚫️		⚫️	⚫️

✅❎ Passed

🛠🛠 TODO

❌❌ Currently failing