Maintenance: Update dependency rubocop-rspec to v2.30.0

Gemfile.lock

@@ -575,7 +575,7 @@ GEM
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
-    rubocop-rspec (2.29.2)
+    rubocop-rspec (2.30.0)
       rubocop (~> 1.40)
       rubocop-capybara (~> 2.17)
       rubocop-factory_bot (~> 2.22)

spec/models/transaction/notification_spec.rb

@@ -42,7 +42,7 @@ RSpec.describe Transaction::Notification, type: :model do
     let(:reason_en) { 'You are receiving this because you are the owner of this ticket.' }
     let(:reason_de) do
       Translation.translate('de-de', reason_en).tap do |translated|
-        expect(translated).not_to eq(reason_en)
+        expect(translated).not_to eq(reason_en) # rubocop:disable RSpec/ExpectInLet
       end
     end