Capitalise "article" in SchemaOrg metadata

This appears to be case-sensitive, and this appears to conventionally capitalised.

Also adds phan suppressions so it passes, as it was failing due to the backwards compatibility code.

Change-Id: I2c0aa1dbf45b36dd428e009ac337a0a23adafbec
(cherry picked from commit 084e1b5aab7e54d8597e6734f49cab8d519e9e47)