doc: fix typo in FAQ
doc: fix typo in FAQ

Change-Id: I956d6d1dbf8516cb65eb3a0686a3b0584b4a6840
GitHub-Last-Rev: 1c928f3c67eceae424cbcd6b0935605a78728604
GitHub-Pull-Request: golang/go#28991
Reviewed-on: https://go-review.googlesource.com/c/151324
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

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