test

Move sound problems doc out of `guides/` directory #2074

Job	Run time
Build site and check links	53s
Check if code excerpts are up to date	16s
Validate Firebase configuration	16s
Check if text can be replaced with site variables	31s
Analyze and test code examples (beta, false)	1m 56s
Analyze and test code examples (stable, false)	1m 49s
	5m 41s

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