virtual/cargo: Version bump to 1.31.1

Copyright: Sony Interactive Entertainment Inc.
Package-Manager: Portage-2.3.52, Repoman-2.3.12
Signed-off-by: Patrick McLean <chutzpah@gentoo.org>

diff --git a/virtual/cargo/cargo-1.31.0.ebuild b/virtual/cargo/cargo-1.31.1.ebuild
similarity index 100%
rename from virtual/cargo/cargo-1.31.0.ebuild
rename to virtual/cargo/cargo-1.31.1.ebuild