updates contain to exchange

Author: ZPain8464

content/docs/troubleshooting.mdx

@@ -148,7 +148,7 @@ Events:
 
 ### Shared Secret Mismatch
 
-Pomerium's independent services communicate securely using a [shared secret](/docs/reference/shared-secret). When Pomerium services contain a mismatched secret, or these services contain a secret that is not the same secret set in the Databroker service, Pomerium will fail.
+Pomerium's independent services communicate securely using a [shared secret](/docs/reference/shared-secret). When Pomerium services exchange a mismatched secret, or these services exchange a secret that is not the same secret set in the Databroker service, Pomerium will fail.
 
 Pomerium Core will log a shared secret mismatch with: