update option name

Will's original implementation gave this option the name `escape_interpolated_html`, but it was changed to `escape_filter_interpolations` in the review process

dashboard/config/initializers/haml.rb

@@ -1,3 +1,3 @@
 # Disable escaping HTML in interpolated strings, for backwards compatibility with Haml < 5 behavior.
 # See: https://github.com/haml/haml/pull/984
-Haml::Template.options[:escape_interpolated_html] = false
+Haml::Template.options[:escape_filter_interpolations] = false