Update docs for entrypoints #2324

Job	Run time
opentelemetry-api	26s
opentelemetry-sdk	28s
opentelemetry-semantic-conventions	23s
opentelemetry-proto-gen-latest	23s
opentelemetry-exporter-zipkin-json	20s
opentelemetry-exporter-zipkin-proto-http	20s
opentelemetry-exporter-otlp-combined	25s
opentelemetry-exporter-otlp-proto-common	19s
opentelemetry-propagator-b3	22s
opentelemetry-getting-started	20s
opentelemetry-exporter-otlp-proto-http	25s
opentelemetry-propagator-jaeger	29s
opentelemetry-exporter-opencensus	33s
opentelemetry-opentracing-shim	24s
opentelemetry-exporter-otlp-proto-grpc-latest	23s
opentelemetry-opencensus-shim	21s
opentelemetry-exporter-zipkin-combined	18s
opentelemetry-exporter-prometheus	24s
opentelemetry-test-utils	23s
	7m 26s

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