Update Freebuff limited mode FAQ (#682) #6635

Job	Run time
build-and-check	3m 12s
test-integration-packages/internal	1m 0s
test-integration-packages/billing	1m 1s
test-integration-packages/agent-runtime	39s
test-integration-cli	51s
test-integration-web	39s
test-integration-sdk	1m 18s
test-packages/agent-runtime	42s
test-common	38s
test-sdk	48s
test-packages/billing	40s
test-cli	1m 1s
test-web	57s
test-.agents	44s
test-integration-common	43s
test-packages/internal	52s
	15m 45s

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