Simplify freebuff get-started header #5976

Job	Run time
build-and-check	3m 3s
test-integration-packages/internal	1m 2s
test-integration-packages/billing	1m 17s
test-integration-cli	48s
test-integration-web	47s
test-integration-sdk	1m 22s
test-integration-common	49s
test-integration-packages/agent-runtime	49s
test-packages/billing	47s
test-cli	53s
test-common	44s
test-packages/internal	56s
test-sdk	51s
test-web	56s
test-.agents	37s
test-packages/agent-runtime	49s
	16m 30s

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