Add Japanese Mobile Software Competition Act link

Author: marcprux

src/data/regulators.yaml

@@ -1484,6 +1484,8 @@ countries:
           pl: "E-mail: [intnldiv@jftc.go.jp](mailto:intnldiv@jftc.go.jp?cc=japan@keepandroidopen.org)"
           zh-CN: "电子邮件：[intnldiv@jftc.go.jp](mailto:intnldiv@jftc.go.jp?cc=japan@keepandroidopen.org)"
           zh-TW: "電子郵件：[intnldiv@jftc.go.jp](mailto:intnldiv@jftc.go.jp?cc=japan@keepandroidopen.org)"
+      - text:
+          en: "Contact the [Mobile Software Competition Act (MCSA)](https://www.msca-soudan.jftc.go.jp/)"
       - text:
           ar: "تواصل مع [لجنة التجارة العادلة اليابانية (JFTC)](https://www.jftc.go.jp/)"
           en: "Contact the [Japan Fair Trade Commission (JFTC)](https://www.jftc.go.jp/)"