Update spec/Section 6 -- Execution.md

Co-authored-by: Benoit 'BoD' Lubek <[email protected]>

Author: martinbonnin

spec/Section 6 -- Execution.md

@@ -66,7 +66,7 @@ GetOperation(document, operationName):
 ### Validating Requests
 
 As explained in the Validation section, only requests which pass all validation
-rules should be process. If validation errors are known, they should be reported
+rules should be processed. If validation errors are known, they should be reported
 in the list of "errors" in the response and the request must fail without
 processing.