Fix Readme formatting for Installation section

Author: petyaslavova

README.md

@@ -34,13 +34,14 @@ The Python interface to the Redis key-value store.
 Start a redis via docker (for Redis versions >= 8.0):
 
 ``` bash
-docker run -p 6379:6379 -it redis:latest
+$ docker run -p 6379:6379 -it redis:latest
 ```
 
 Start a redis via docker (for Redis versions < 8.0):
 
 ``` bash
-docker run -p 6379:6379 -it redis/redis-stack:latest
+$ docker run -p 6379:6379 -it redis/redis-stack:latest
+```
 
 To install redis-py, simply: