Fix spelling from last commit

cmd/web/handlers.go

@@ -60,7 +60,7 @@ func (app *application) createElection(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	w.Header().Set("Location", fmt.Sprintf("/elections/%v", electionId))
+	w.Header().Set("Location", fmt.Sprintf("/election/%v", electionId))
 	w.Write(res)
 }