Update instructions for mobile app data upload

[nataliajacobowitz]

Mobile app information architecture changes that will be a part of 1.9.0

Description

Please include a summary of the change and what is does. Please also include relevant motivation and context.

[viambot]

Overall readability score: 55.6 (🟢 +0)

File	Readability
upload.md	66.27 (🟢 +0.2)

View detailed metrics

🟢 - Shows an increase in readability
🔴 - Shows a decrease in readability

File	Readability	FRE	GF	ARI	CLI	DCRS
upload.md	66.27	52.09	9.95	11.2	9.86	6.78
	🟢 +0.2	🟢 +0	🟢 +0	🟢 +0.1	🟢 +0.06	🔴 -0.01

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	55.6	47.44	10.64	13.21	12.08	7.61
	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0

View metric targets

Metric	Range	Ideal score
Flesch Reading Ease	100 (very easy read) to 0 (extremely difficult read)	60
Gunning Fog	6 (very easy read) to 17 (extremely difficult read)	8 or less
Auto. Read. Index	6 (very easy read) to 14 (extremely difficult read)	8 or less
Coleman Liau Index	6 (very easy read) to 17 (extremely difficult read)	8 or less
Dale-Chall Readability	4.9 (very easy read) to 9.9 (extremely difficult read)	6.9 or less

[viambot]

You can view a rendered version of the docs from this PR at https://docs-test.viam.dev/2613