fix: App not build if app name contains single quotes (#279)

- In our Android app, we save the app_name in an XML file. However, Android XML resource files do not support single quotes.
- In this commit, we sanitize the `app_name` in before generating the `config.json` file

fastlane/actions/modify_config_json_file.rb

@@ -34,7 +34,13 @@ def self.replace_fields_value(fields, data)
           app_config_json = JSON.parse(data)
           config_json.each do |key, value|
             if app_config_json.key?(key) && fields.include?(key)
-                config_json[key] = app_config_json[key]
+                if key == "app_name"
+                    temp_app_name = app_config_json[key]
+                    # Replace single quotes with escaped single quotes
+                    config_json[key] = temp_app_name.gsub("\'", "\\\\'")
+                else
+                    config_json[key] = app_config_json[key]
+                end
             end
           end
           File.open(path,"w") do |f|