CI failure fix for external-type-check #4196

Job	Run time
lint	20m 14s
coverage	8m 22s
cargo-deny	32s
external-types (opentelemetry)	1m 3s
docs	5m 58s
external-types (opentelemetry-sdk)	1m 12s
msrv	4m 21s
non-default-examples (opentelemetry-otlp/examples/external-otlp-grpcio-async-std)	5m 10s
non-default-examples (opentelemetry-otlp/examples/basic-otlp)	42s
test (stable)	16m 32s
test (beta)	17m 16s
	1h 21m 22s

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