Change the version of OpenVINO compatibility (#797)

* Change the version of OpenVINO compatibility

components/openvino/README.md

@@ -6,9 +6,12 @@
 
 ### Preparation
 
-* Download [OpenVINO toolkit 2018R5](https://software.intel.com/en-us/openvino-toolkit) .tgz installer (offline or online) for Ubuntu platforms.
-* Put downloaded file into ```cvat/components/openvino```.
-* Accept EULA in the `cvat/components/eula.cfg` file.
+- Download the latest [OpenVINO toolkit](https://software.intel.com/en-us/openvino-toolkit) .tgz installer
+(offline or online) for Ubuntu platforms. Note that OpenVINO does not maintain forward compatability between
+Intermediate Representations (IRs), so the version of OpenVINO in CVAT and the version used to translate the
+models needs to be the same.
+- Put downloaded file into ```cvat/components/openvino```.
+- Accept EULA in the `cvat/components/eula.cfg` file.
 
 ### Build docker image
 ```bash