docs: Added kata-runtime to implementations

Added the Kata Containers project runtime to the list of
implementations.

Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>

implementations.md

@@ -13,6 +13,7 @@ If you know of any associated projects that are not listed here, please file a p
 
 * [hyperhq/runv][runv] - Hypervisor-based runtime for OCI
 * [clearcontainers/runtime][cc-runtime] - Hypervisor-based OCI runtime utilising [virtcontainers][virtcontainers] by Intel®.
+* [kata-containers/runtime][kata-runtime] - Hypervisor-based OCI runtime combining technology from [clearcontainers/runtime][cc-runtime] and [hyperhq/runv][runv].
 
 ## <a name="implementationsTestingTools" />Testing & Tools
 
@@ -24,6 +25,7 @@ If you know of any associated projects that are not listed here, please file a p
 [runc]: https://github.com/opencontainers/runc
 [runv]: https://github.com/hyperhq/runv
 [cc-runtime]: https://github.com/clearcontainers/runtime
+[kata-runtime]: https://github.com/kata-containers/runtime
 [virtcontainers]: https://github.com/containers/virtcontainers
 [octool]: https://github.com/kunalkushwaha/octool
 [oct]: https://github.com/huawei-openlab/oct