Fix typo in OpCodes.xml (#9354)

Author: ericmutta

xml/System.Reflection.Emit/OpCodes.xml

@@ -5451,7 +5451,7 @@
 
  The `cpblk` instruction copies a number (type `unsigned int32`) of bytes from a source address (of type `*`, `native int`, or `&`) to a destination address (of type `*`, `native int`, or `&`). The behavior of `cpblk` is unspecified if the source and destination areas overlap. 
 
- `cpblk` assumes that both the source and destination addressed are aligned to the natural size of the machine. The `cpblk` instruction can be immediately preceded by the `unaligned.<prefix>` instruction to indicate that either the source or the destination is unaligned. 
+ `cpblk` assumes that both the source and destination addresses are aligned to the natural size of the machine. The `cpblk` instruction can be immediately preceded by the `unaligned.<prefix>` instruction to indicate that either the source or the destination is unaligned. 
 
  The operation of the `cpblk` instruction can be altered by an immediately preceding <xref:System.Reflection.Emit.OpCodes.Volatile> or <xref:System.Reflection.Emit.OpCodes.Unaligned> prefix instruction.