Update README.md

minor typo in channel name

Signed-off-by: Sohan <1119120+sohanmaheshwar@users.noreply.github.com>

Author: sohanmaheshwar

examples/redis-trigger/README.md

@@ -35,11 +35,11 @@ Send a message on a redis channel named `messages`:
 
 ```bash
 $ redis-cli
-127.0.0.1:6379> publish messaged "hello world"
+127.0.0.1:6379> publish messages "hello world"
 ```
 
 The app should output:
 
 ```bash
 hello world
-```
+```