Update Docker Image tag

Author: jenhaoyang

docs/quickstart.md

@@ -8,13 +8,13 @@ The quickest way to try RedisAI is by launching its official Docker container im
 
 ### On a CPU only machine
 ```
-docker run -p 6379:6379 redislabs/redisai:latest
+docker run -p 6379:6379 redislabs/redisai:edge-cpu
 ```
 
 ### On a GPU machine
 
 ```
-docker run -p 6379:6379 --gpus all -it --rm redislabs/redisai:latest-gpu
+docker run -p 6379:6379 --gpus all -it --rm redislabs/redisai:edge-gpu
 ```
 
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