Codegen for openapi v204

* Update request_end instrumentation example in README.md

OPENAPI_VERSION

@@ -1 +1 @@
-v184
+v204

README.md

@@ -261,9 +261,13 @@ For example:
 
 ```ruby
 Stripe::Instrumentation.subscribe(:request_end) do |request_event|
+  # Filter out high-cardinality ids from `path`
+  path_parts = event.path.split("/").drop(2)
+  resource = path_parts.map { |part| part.match?(/\A[a-z_]+\z/) ? part : ":id" }.join("/")
+
   tags = {
     method: request_event.method,
-    resource: request_event.path.split('/')[2],
+    resource: resource,
     code: request_event.http_status,
     retries: request_event.num_retries
   }

lib/stripe/resources/refund.rb

@@ -6,6 +6,10 @@ module Stripe
   # but not yet refunded. Funds will be refunded to the credit or debit card that
   # was originally charged.
   #
+  # Stripe Tax users with recurring payments and invoices can create [Credit Notes](https://stripe.com/docs/api/credit_notes),
+  # which reduce overall tax liability because tax is correctly recalculated and
+  # apportioned to the related invoice.
+  #
   # Related guide: [Refunds](https://stripe.com/docs/refunds).
   class Refund < APIResource
     extend Stripe::APIOperations::Create

lib/stripe/resources/source.rb

@@ -7,6 +7,10 @@ module Stripe
   # just like a `Card` object: once chargeable, they can be charged, or can be
   # attached to customers.
   #
+  # Stripe doesn't recommend using the deprecated [Sources API](https://stripe.com/docs/api/sources).
+  # We recommend that you adopt the [PaymentMethods API](https://stripe.com/docs/api/payment_methods).
+  # This newer API provides access to our latest features and payment method types.
+  #
   # Related guides: [Sources API](https://stripe.com/docs/sources) and [Sources & Customers](https://stripe.com/docs/sources/customers).
   class Source < APIResource
     extend Stripe::APIOperations::Create

test/test_helper.rb

@@ -3,7 +3,7 @@
 # Report test coverage to coveralls for only one Ruby version to avoid
 # repeated builds. This also accounts for coveralls_reborn requiring
 # RUBY_VERSION >= 2.5.
-if RUBY_VERSION.start_with?("3.1.")
+if ENV.key?("COVERALLS_REPO_TOKEN") && RUBY_VERSION.start_with?("3.1.")
   require "coveralls"
   Coveralls.wear!
 end