docs(telemetry): fixes typos and errors in documented code examples (… #262

Job	Run time
[opentelemetry-aws-xray-release] Draft release	54s
[opentelemetry-grpcbox-release] Draft release	51s
[opentelemetry-httpoison-release] Draft release	41s
[opentelemetry-nebulex-release] Draft release	40s
[opentelemetry-redix-release] Draft release	51s
[opentelemetry-broadway-release] Draft release	20s
[opentelemetry-finch-release] Draft release	41s
[opentelemetry-phoenix-release] Draft release	14s
[opentelemetry-bandit-release] Draft release	8s
[opentelemetry-tesla-release] Draft release	22s
[opentelemetry-process-propagator-release] Draft release	24s
[opentelemetry-ecto-release] Draft release	22s
[opentelemetry-req-release] Draft release	16s
[opentelemetry-xandra-release] Draft release	30s
[opentelemetry-cowboy-release] Draft release	16s
[opentelemetry-dataloader-release] Draft release	15s
[opentelemetry-oban-release] Draft release	17s
[opentelemetry-elli-release] Draft release	40s
[opentelemetry-telemetry-release] Draft release	19s
[otel-http-release] Draft release	27s
[opentelemetry-commanded-release] Draft release	6s
	9m 34s

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