docs: Update integrations.mdx (#328)

* Update integrations.mdx

The first sentence in this paragraph for `### API Keys and Tokens` was missing a word or two and it wasn't entirely clear what did the original author of this docs page intended.

I've entered what seems to be the missing context but happy to re-phrase too if another wording makes better sense here.

* Made it clear that API keys are provided by you in your code

---------

Co-authored-by: Matt Aitken <[email protected]>

Author: lirantal

docs/documentation/concepts/integrations.mdx

@@ -72,7 +72,7 @@ There are some things worth highlighting here:
 
 ### API Keys and Tokens
 
-You the value in when creating your Integration client. They are never sent from your server by the Trigger.dev service, they are local to your servers. We recommend you use a secure method of storing these values and passing them to your code, like environment variables.
+You provide the API Key value when creating your Integration client. Keys aren't sent from your server by the Trigger.dev service, they are local to your servers. We recommend you use a secure method of storing these values and passing them to your code, like environment variables.
 
 ### OAuth