This corrects the final lesson to use legal 915mHz radio frequency. Also updates it to use GPS coordinates as the payload. Adds another ino for a heltec v3 lora radio and u-blox GPS that can support high altitude flight

[snarfattack]

Description

Brief description of what changed and why.

Type of Change

• New lesson or major content addition
• Documentation fix or clarification
• Typo/grammar correction
• Image/asset update
• Content reorganization
• Other (please describe):

Testing Checklist

• All links verified and working
• Images display correctly
• Markdown renders properly
• Content reviewed for spelling/grammar
• Code examples tested (if applicable)
• Hardware instructions verified (if applicable)

Safety Review

• N/A - No safety-critical content
• Wiring diagrams verified against hardware
• Component specifications accurate
• Safety warnings included where needed
• Polarity/power warnings present

Documentation Quality

• Follows lesson structure template (for lessons)
• Technical terms defined on first use
• Alt text provided for all images
• Educational tone and style maintained
• Related content updated/cross-referenced

Additional Notes

Any context reviewers should know? Related issues? Testing details?

Screenshots (if visual changes)

Include before/after or relevant screenshots here.