Add key to skill management iterable.

src/components/profile/SkillManagement.tsx

@@ -219,6 +219,7 @@ function SkillManagement() {
                   onAdd={() => addUserSkillMutation({ skillName, description })}
                   onClick={() => setSelectedSkill({ description, skillName })}
                   skillName={skillName}
+                  key={skillName}
                 />
               )
             )}