docs: fix a typo in isolated-execution.md (redis#1795)

Author: fishmandev

docs/isolated-execution.md

@@ -8,7 +8,7 @@ Sometimes you want to run your commands on an exclusive connection. There are a
 
 Below are several examples of how to use isolated execution.
 
-> NOTE: Behind the scences we're using [`generic-pool`](https://www.npmjs.com/package/generic-pool) to provide a pool of connections that can be isolated. Go there to learn more.
+> NOTE: Behind the scenes we're using [`generic-pool`](https://www.npmjs.com/package/generic-pool) to provide a pool of connections that can be isolated. Go there to learn more.
 
 ## The Simple Scenario