Update copyrights.

ioquatix · ioquatix · commit cb986db1d7a4 · 2026-02-26T14:23:43.000+13:00
diff --git a/lib/async/grpc/version.rb b/lib/async/grpc/version.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 # Released under the MIT License.
-# Copyright, 2025, by Samuel Williams.
+# Copyright, 2025-2026, by Samuel Williams.
 
 # @namespace
 module Async
