Typo in Attribute Listing (Annex B) Attributes VideoKeyColor

[danielmuellerma]

VideoColorKey_B -> should be VideoKeyColor to be consistent with R and G

<Attribute
Name="VideoKeyColor_R"
Pretty="R"
Feature="Color.ColorKey"
PhysicalUnit="None"
Color="0.64,0.33,21.3" />
<Attribute
Name="VideoKeyColor_G"
Pretty="G" Feature="Color.ColorKey"
PhysicalUnit="None"
Color="0.3,0.6,71.5" />
<Attribute
Name="VideoColorKey_B"
Pretty="B" Feature="Color.ColorKey"
PhysicalUnit="None"
Color="0.15,0.06,7.2" />
<Attribute