Update flow.md

Author: pareenaverma

content/learning-paths/servers-and-cloud-computing/cca-trustee/flow.md

@@ -199,7 +199,7 @@ Using JWK key from JWT header
 Error: verifying signed EAR from "ear.jwt" using "JWK header" key: failed verifying JWT message: jwt.Parse: failed to parse token: jwt.Validate: validation failed: "exp" not satisfied: token is expired
 ```
 
-Please obtain a new EAR message by re-runing the attestation command.
+Please obtain a new EAR message by re-running the attestation command.
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