Gemfile.rails51 in ndr_import-8.5.0

- old
+ new

@@ -1,6 +1,9 @@
 source 'https://rubygems.org'
 
+# ooxml_decrypt is not published to rubygems.org so we need to specify where it is
+gem 'ooxml_decrypt', git: 'https://github.com/timgentry/ooxml_decrypt'
+
 gemspec path: '..'
 
 # Minitest 5.10.2 doesn't work with Rails version
 gem 'minitest', '< 5.10.2'