Fix wording of ldloca description (#11313)

Author: Smaug123

xml/System.Reflection.Emit/OpCodes.xml

@@ -10358,7 +10358,7 @@ The following <xref:System.Reflection.Emit.ILGenerator.Emit%2A> method overloads
 
  The stack transitional behavior, in sequential order, is:
 
-1.  The address stored in the local variable at the specified index is pushed onto the stack.
+1.  The address of the local variable at the specified index is pushed onto the stack.
 
  The `ldloca` instruction pushes the address of the local variable number at the passed index onto the stack, where local variables are numbered 0 onwards. The value pushed on the stack is already aligned correctly for use with instructions like <xref:System.Reflection.Emit.OpCodes.Ldind_I> and <xref:System.Reflection.Emit.OpCodes.Stind_I>. The result is a managed pointer (type `&`). The local variable is stored in unmanaged memory, so the return value can be converted to an unmanaged pointer without pinning.
 
@@ -10420,7 +10420,7 @@ The following <xref:System.Reflection.Emit.ILGenerator.Emit%2A> method overloads
 
  The stack transitional behavior, in sequential order, is:
 
-1.  The address stored in the local variable at the specified index is pushed onto the stack.
+1.  The address of the local variable at the specified index is pushed onto the stack.
 
  The `ldloca.s` instruction pushes the address of the local variable number at the passed index onto the stack, where local variables are numbered 0 onwards. The value pushed on the stack is already aligned correctly for use with instructions like <xref:System.Reflection.Emit.OpCodes.Ldind_I> and <xref:System.Reflection.Emit.OpCodes.Stind_I>. The result is a transient pointer (type `*`).