Fix broken markdown in command docs (#920)

I screwed up in ##826 and broke the `CommandAttribute` section.

docs/guides/commands/commands.md

@@ -93,9 +93,9 @@ If you would like a parameter to parse until the end of a Command,
 flag the parameter with the [RemainderAttribute]. This will allow a
 user to invoke a Command without wrapping a parameter in quotes.
 
-Finally, flag your Command with the [CommandAttribute] (you must
+Finally, flag your Command with the [CommandAttribute]. (you must
 specify a name for this Command, except for when it is part of a
-Module Group - see below).
+Module Group - see below)
 
 [RemainderAttribute]: xref:Discord.Commands.RemainderAttribute
 [CommandAttribute]: xref:Discord.Commands.CommandAttribute
@@ -340,4 +340,4 @@ and must be explicitly added.
 
 To install a TypeReader, invoke [CommandService.AddTypeReader].
 
-[CommandService.AddTypeReader]: xref:Discord.Commands.CommandService#Discord_Commands_CommandService_AddTypeReader__1_Discord_Commands_TypeReader_
+[CommandService.AddTypeReader]: xref:Discord.Commands.CommandService#Discord_Commands_CommandService_AddTypeReader__1_Discord_Commands_TypeReader_