www: make note about the expansion box identical

esp32/www/abcmem.html

@@ -57,8 +57,8 @@
 	  <span class="help">16-22K, 28-30K (IEC)</span>
 	</label>
 	<p class="abc80box,help"><span>If MAX80 is used in a Luxor
-	expansion box ABC, the expansion box needs to be rejumpered to
-	support external memories on the I/O side of the
+	expansion box ABC for ABC80, the expansion box needs to be
+	rejumpered to support external memories on the I/O side of the
 	box.</span><br />
 	  <a class="seemanual" href="https://www.abc80.org/docs/abc80_bruksanvisning_expanstionslada_abc.pdf">See manual.</a></p>