Update mission_design.md

docs/fornax-design/mission_design.md

@@ -1,4 +1,4 @@
-# Desgin of Mission in Fornax
+# Design of Mission in Fornax
 
 A CRD called "Mission" is used to store the actual workload definition (Mission/MissionSpec/MssionResource or Mission/MissionSpec/MissionCommand) and destination information (Mission/MissionSpec/Placement) to deploy to the edge clusters. User can also configure how the mission state is reported by specifying the field of Mission/StateCheck/Command.
 
@@ -87,4 +87,4 @@ The following built-in labels are defined by Fornax automatically:
 ## Mission Examples
 Some simple mission yamls are given in tests/edgecluster/data/missions.
 
-The mission yamls to build a more complicated AI face recognition app is given in tests/edgecluster/data/ai_app/.
+The mission yamls to build a more complicated AI face recognition app is given in tests/edgecluster/data/ai_app/.