paasio: Title as "PaaS I/O" instead of default "Paasio" (#1589)
paasio: Title as "PaaS I/O" instead of default "Paasio" (#1589)

Improves the copy only, so acceptable in light of #1560.
exercism/x-common,jmluy/x-common,jmluy/x-common,jmluy/x-common,petertseng/x-common,exercism/x-common,petertseng/x-common