Revert "In git.arvados.org/arvados.git/sdk/go/arvados, change the name

of the". This is not necessary now that the toplevel COPYING file is
recognized by pkg.go.dev.

This reverts commit 11924a1bd70a76ff1a349adb9f8b94ef9ae1ecf8.

No issue #

Arvados-DCO-1.1-Signed-off-by: Ward Vandewege <ward@curii.com>

diff --git a/sdk/go/arvados/COPYING b/sdk/go/arvados/apache-2.0.txt
similarity index 100%
rename from sdk/go/arvados/COPYING
rename to sdk/go/arvados/apache-2.0.txt