time: change wording in duration hours example
time: change wording in duration hours example

Change-Id: I86728a1c6c20471beaa3546ca7a43a8edeb9f0b7
Reviewed-on: https://go-review.googlesource.com/50691
Run-TryBot: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Adrian Hesketh <2d78f38e262d34d2727fab337fe9f17619ef8a15@hushmail.com>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

golang/go,akutz/go,Cofyc/go,polyverse-security/go,josharian/go,CAFxX/go,Cofyc/go,josharian/go,polyverse-security/go,josharian/go,CAFxX/go,josharian/go,polyverse-security/go,golang/go,codestation/go,cloudflare/go,josharian/go,codestation/go,codestation/go,nawawi/go,codestation/go,akutz/go,Cofyc/go,codestation/go,nawawi/go,polyverse-security/go,golang/go,Cofyc/go,nawawi/go,Cofyc/go,nawawi/go,CAFxX/go,polyverse-security/go,codestation/go,codestation/go,golang/go,akutz/go,akutz/go,josharian/go,nawawi/go,codestation/go,Cofyc/go,josharian/go,cloudflare/go,cloudflare/go,golang/go,CAFxX/go,cloudflare/go,cloudflare/go,Cofyc/go,CAFxX/go,polyverse-security/go,Cofyc/go,cloudflare/go,golang/go,cloudflare/go,nawawi/go,CAFxX/go,polyverse-security/go,nawawi/go,CAFxX/go,golang/go,cloudflare/go,CAFxX/go,christopher-henderson/Go,golang/go,josharian/go,akutz/go,nawawi/go,akutz/go,akutz/go,akutz/go,polyverse-security/go