Apply Rails/SafeNavigation rubocop rule

app/controllers/tracking/base_controller.rb

@@ -9,7 +9,7 @@ class Tracking::BaseController < ApplicationController
   private
 
     def verify_tracker
-      raise CanCan::AccessDenied unless current_user.try(:tracker?) || current_user.try(:administrator?)
+      raise CanCan::AccessDenied unless current_user&.tracker? || current_user&.administrator?
     end
 
 end

app/controllers/tracking/budget_investments_controller.rb

@@ -47,8 +47,7 @@ class Tracking::BudgetInvestmentsController < Tracking::BaseController
     end
 
     def heading_filters
-      investments = @budget.investments.by_tracker(current_user.tracker.try(:id))
-                                       .distinct
+      investments = @budget.investments.by_tracker(current_user.tracker&.id).distinct
       investment_headings = Budget::Heading.where(id: investments.pluck(:heading_id).uniq)
                                            .order(name: :asc)
       all_headings_filter = [