doc: fix typo in Go 1.12.14 document
doc: fix typo in Go 1.12.14 document

Change-Id: I3641a086f167a1337aaaacd2d758b6a42b84a7fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/209845
Run-TryBot: Carlos Amedee <ab5e2bca84933118bbc9d48ffaccce3bac4eeb64@golang.org>
Run-TryBot: Alexander Rakoczy <60c6d277a8bd81de7fdde19201bf9c58a3df08f4@golang.org>
Reviewed-by: Alexander Rakoczy <60c6d277a8bd81de7fdde19201bf9c58a3df08f4@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

nawawi/go,cloudflare/go,cloudflare/go,nawawi/go,nawawi/go,CAFxX/go,nawawi/go,golang/go,CAFxX/go,nawawi/go,cloudflare/go,akutz/go,golang/go,akutz/go,CAFxX/go,CAFxX/go,cloudflare/go,CAFxX/go,cloudflare/go,golang/go,cloudflare/go,golang/go,CAFxX/go,nawawi/go,golang/go,nawawi/go,akutz/go,nawawi/go,CAFxX/go,golang/go,akutz/go,cloudflare/go,cloudflare/go,golang/go,CAFxX/go,akutz/go,golang/go,akutz/go,akutz/go,akutz/go