chore: update docker image desc

RELEASE.md

@@ -53,7 +53,7 @@ The following example shows how Jina is released from 0.9 to 0.9.2 according to
 
 ## Docker image versioning
 
-The docker image name starts with `jinaai/jina` followed by a tag composed of three parts:
+Our univeral Docker image is ready-to-use on linux/amd64, linux/armv7+, linux/arm/v6. The Docker image name always starts with `jinaai/jina` followed by a tag composed of three parts:
 
 ```text
 jinaai/jina:{version}{python_version}{extra}
@@ -114,4 +114,4 @@ Six images are built, i.e. taking the combination of:
 |![](https://img.shields.io/docker/image-size/jinaai/jina/master-devel?label=jinaai%2Fjina%3Amaster-devel&logo=docker)|
 |![](https://img.shields.io/docker/image-size/jinaai/jina/master-daemon?label=jinaai%2Fjina%3Amaster-daemon&logo=docker)|
 |![](https://img.shields.io/docker/image-size/jinaai/jina/master-py38-devel?label=jinaai%2Fjina%3Amaster-py38-devel&logo=docker)|
-|![](https://img.shields.io/docker/image-size/jinaai/jina/master-py38-daemon?label=jinaai%2Fjina%3Amaster-py38-daemon&logo=docker)|
+|![](https://img.shields.io/docker/image-size/jinaai/jina/master-py38-daemon?label=jinaai%2Fjina%3Amaster-py38-daemon&logo=docker)|