examples: fix typos #2470

Job	Run time
cargo-deny check	22s
codegen	13s
rustfmt	17s
check (ubuntu-latest)	39s
check (macOS-latest)	48s
Check unused dependencies (ubuntu-latest)	4m 17s
check (windows-latest)	2m 56s
Check unused dependencies (macOS-latest)	3m 15s
Interop Tests (ubuntu-latest)	43s
Check unused dependencies (windows-latest)	6m 56s
Interop Tests (macOS-latest)	38s
Check MSRV	45s
Interop Tests (windows-latest)	2m 45s
test (ubuntu-latest)	2m 30s
test (macOS-latest)	1m 56s
test (windows-latest)	4m 46s
	33m 46s

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