ActiveSupport::ErrorReporter#report does not accept String argument

Fixes rails#53997 [ci skip]

Author: zzak

activesupport/lib/active_support/error_reporter.rb

@@ -207,6 +207,12 @@ def set_context(...)
     #
     #   Rails.error.report(error)
     #
+    # The +error+ argument must be an instance of Exception.
+    #
+    #   Rails.error.report(Exception.new("Something went wrong"))
+    #
+    # Otherwise you can use #unexpected to report an error which does accept a
+    # string argument.
     def report(error, handled: true, severity: handled ? :warning : :error, context: {}, source: DEFAULT_SOURCE)
       return if error.instance_variable_defined?(:@__rails_error_reported)
       raise ArgumentError, "Reported error must be an Exception, got: #{error.inspect}" unless error.is_a?(Exception)