Update statement spec

Author: savvan0h

moodle_video_logs/STATEMENT_SPEC.adoc

@@ -2,7 +2,7 @@
 :lang: ja
 :source-highlighter: rouge
 :author: 国立情報学研究所
-:revdate: 2021年7月29日
+:revdate: 2023年5月17日
 :doctype: book
 :version-label:
 :chapter-label:
@@ -80,7 +80,7 @@ TSVファイルはヘッダーを含まず、下表の通りログが格納さ
             "en": "Moodle"
           },
           "description": {
-            "en": "Moodle is a open source learning platform designed to provide educators, administrators and learners with a single robust, secure and integrated system to create personalized learning environments."
+            "en": ""
           }
         }
       }

xapi_stmt_gen/README.md

@@ -14,7 +14,7 @@ If not specified, the following properties will be applied.
   - category.id =  http://moodle.org
   - category.definition.type = http://id.tincanapi.com/activitytype/source
   - category.definition.name['en'] = Moodle
-  - category.definition.description['en'] = Moodle is a open source learning platform designed to provide educators, administrators and learners with a single robust, secure and integrated system to create personalized learning environments.
+  - category.definition.description['en'] = ''
 * context.platform = Moodle
 * context.language = en
 * timestamp = <mdl_logstore_standard_log.timecreated> (Converted)
@@ -1459,7 +1459,7 @@ If not specified, the following properties will be applied.
   - category.id =  http://moodle.org
   - category.definition.type = http://id.tincanapi.com/activitytype/source
   - category.definition.name['en'] = Moodle
-  - category.definition.description['en'] = Moodle is a open source learning platform designed to provide educators, administrators and learners with a single robust, secure and integrated system to create personalized learning environments.
+  - category.definition.description['en'] = ''
 * context.platform = Moodle
 * context.language = en
 * timestamp = <mdl_scorm_scoes_track.timemodified> (Converted)