Update presentation-api sample (#499)
Update presentation-api sample (#499)

* Update presentation-api sample

* Remove colon in feature name that Jekyll complains about

* Add semicolon

GoogleChrome/samples,beaufortfrancois/samples,beaufortfrancois/samples,689/samples,rsolomakhin/samples,GoogleChrome/samples,jeffposnick/samples,beaufortfrancois/samples,689/samples,689/samples,rsolomakhin/samples,rsolomakhin/samples,beaufortfrancois/samples,GoogleChrome/samples,jeffposnick/samples,jeffposnick/samples,GoogleChrome/samples,GoogleChrome/samples,jeffposnick/samples