chore: english docs for demos #2130

Job	Run time
call-check-pr-status / check_pr_status	3s
build (debug)	5m 32s
build (release)	4m 30s
test-integration-ten-manager	1s
test-integration-cpp	1s
test-integration-go	1s
test-integration-python	1s
test-standalone	1s
	10m 10s

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