[V3 Context] Aliasing Colour to color (#1916)

* [V3 Context] Aliasing Colour to color

We should stay consistent here and keep the aliasing from upstream, even when we extend this.

* fmt pass

redbot/core/commands/context.py

@@ -152,6 +152,11 @@ class Context(commands.Context):
         else:
             return self.bot.color
 
+    @property
+    def embed_color(self):
+        # Rather than double awaiting.
+        return self.embed_colour
+
     async def embed_requested(self):
         """
         Simple helper to call bot.embed_requested