doc: update NetBSD status

Fixes #23073

Change-Id: Ia43b28beeff9e57579caf5dcb76146ee29d5033b
Reviewed-on: https://go-review.googlesource.com/82918Reviewed-by: Ian Lance Taylor <iant@golang.org>

doc/go1.10.html

@@ -77,9 +77,8 @@ support for FreeBSD 9.3 has been removed.
 
 <p id="netbsd">
 Go now runs on NetBSD again, but requires the unreleased NetBSD 8.
-Only <code>GOARCH=amd64</code> running on NetBSD amd64 and <code>GOARCH=386</code>
-running on NetBSD i386 are known to work. 32-bit Go binaries are known to
-fail on 64-bit NetBSD kernels. <code>GOARCH=arm</code> is untested.
+Only <code>GOARCH</code> <code>amd64</code> and <code>386</code> are
+known to work. The <code>arm</code> port might work but is untested.
 </p>
 
 <p id="openbsd">