Fix typo in RSpec of AnnotateModels (#731)

Author: nard-tech

spec/lib/annotate/annotate_models_spec.rb

@@ -946,7 +946,7 @@ def mock_column(name, type, options = {})
         end
       end
 
-      context 'when additional_file_patterns is not specified is the options' do
+      context 'when additional_file_patterns is not specified in the options' do
         let(:options) { {} }
 
         it 'returns an empty array' do
@@ -977,7 +977,7 @@ def mock_column(name, type, options = {})
         end
       end
 
-      context 'when additional_file_patterns is not specified is the options' do
+      context 'when additional_file_patterns is not specified in the options' do
         let(:options) { {} }
 
         it 'returns an empty array' do