Update number of stats according to following reports:
Update number of stats according to following reports:

- Number of countries follows 2018 Annual Report
  - "In 2018 we celebrated 7 years of CoderDojo, supported Dojos in over 100 countries"
  - cf. https://coderdojo.com/2019/06/07/coderdojo-foundation-annual-report-2018/
- Number of dojos follows Reports & Governance
  - "CoderDojo inspires in over 1,800 Dojos in 92 countries worldwide."
  - cf. https://coderdojo.com/reporting-governance/

coderdojo-japan/coderdojo.jp,yasslab/coderdojo.jp,yasslab/coderdojo.jp,coderdojo-japan/coderdojo.jp,yasslab/coderdojo.jp,coderdojo-japan/coderdojo.jp,coderdojo-japan/coderdojo.jp