Fix schema.org schema
Fix schema.org schema

switchinnovations/pxt,switch-education/pxt,Microsoft/pxt,switch-education/pxt,playi/pxt,Microsoft/pxt,switch-education/pxt,switchinnovations/pxt,switch-education/pxt,Microsoft/pxt,playi/pxt,Microsoft/pxt,Microsoft/pxt,playi/pxt,switchinnovations/pxt,switch-education/pxt,switchinnovations/pxt,playi/pxt