LCORE-1345: fix grammar typos in e2e

Author: tisnik

docs/e2e_scenarios.md

@@ -82,7 +82,7 @@
 * Check if feedback endpoint fails when required fields are not specified
 * Check if feedback endpoint is working when sentiment is negative
 * Check if feedback endpoint is working when sentiment is positive
-* Check if feedback submittion fails when invald sentiment is passed
+* Check if feedback submission fails when invalid sentiment is passed
 * Check if feedback submission fails when nonexisting conversation ID is passed
 * Check if feedback submission fails when conversation belongs to a different user
 * Check if feedback endpoint is not working when not authorized

tests/e2e/features/feedback.feature

@@ -198,7 +198,7 @@ Feature: feedback endpoint API tests
         }
         """
 
-  Scenario: Check if feedback submittion fails when invald sentiment is passed
+  Scenario: Check if feedback submission fails when invalid sentiment is passed
     Given The system is in default state
     And A new conversation is initialized
     And The feedback is enabled