Fix compile error: borrow of moved value: `header` #2429

Job	Run time
Verify hyper.h is up to date	30s
Check Style	20s
Test with Miri	1m 9s
Test C API (FFI)	43s
minimal-versions	45s
Check MSRV	1m 0s
features	22s
Test stable on ubuntu-latest	1m 18s
udeps	27s
Test stable on windows-latest	2m 43s
Test stable on macOS-latest	1m 34s
Test beta on ubuntu-latest	1m 16s
Test beta on windows-latest	2m 2s
Test beta on macOS-latest	1m 50s
Test nightly on ubuntu-latest	1m 32s
Test nightly on windows-latest	3m 6s
Test nightly on macOS-latest	3m 40s
Check exposed types	20s
Build docs	25s
CI is green	1s
	25m 3s

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