Bump version v2.51.rc6
Bump version v2.51.rc6

panda-os/mwEmbed,kaltura/mwEmbed,bordar/mwEmbed,omridevk/mwEmbed,kaltura/mwEmbed,bordar/mwEmbed,kaltura/mwEmbed,kaltura/mwEmbed,panda-os/mwEmbed,FlixMaster/mwEmbed,slash851/mwEmbed,FlixMaster/mwEmbed,slash851/mwEmbed,panda-os/mwEmbed,FlixMaster/mwEmbed,bordar/mwEmbed,slash851/mwEmbed,omridevk/mwEmbed,alexmilk/mwEmbed,alexmilk/mwEmbed,omridevk/mwEmbed,bordar/mwEmbed,alexmilk/mwEmbed,panda-os/mwEmbed,omridevk/mwEmbed,slash851/mwEmbed,FlixMaster/mwEmbed,alexmilk/mwEmbed