refactor: avoid unwrap examples #3139

Job	Run time
semver	13s
Check Style	8s
Verify hyper.h is up to date	1m 31s
minimal-versions	35s
Check MSRV	2m 37s
Test C API (FFI)	37s
udeps	26s
features	34s
Test cargo-c support (FFI)	27s
Test with Miri	2m 10s
Test stable on macOS-latest	1m 29s
Test stable on windows-latest	2m 8s
Test beta on ubuntu-latest	1m 5s
Test beta on macOS-latest	1m 39s
Test nightly on ubuntu-latest	1m 8s
Test stable on ubuntu-latest	57s
Test nightly on macOS-latest	1m 23s
Test beta on windows-latest	2m 45s
Test nightly on windows-latest	2m 24s
Build docs	23s
Check exposed types	18s
CI is green	4s
	25m 1s

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