[css-align] Fix bikeshed fatal error due to bad reference.

Author: dbaron

css-align/Overview.bs

@@ -1074,7 +1074,7 @@ Inline/Main-Axis Alignment: the 'justify-self' property</h3>
 			<td>
 				Behaves as ''justify-self/stretch'',
 				except that items with an intrinsic size or aspect ratio are treated as ''justify-self/start''.
-				See <a href="https://www.w3.org/TR/css-grid-1/#grid-item-sizing">Grid Item Sizing</a> in [[!CSS-GRID-3]].
+				See <a href="https://www.w3.org/TR/css-grid-1/#grid-item-sizing">Grid Item Sizing</a> in [[!CSS-GRID-1]].
 	</table>
 
     See [[!CSS-GRID-1]] for details.
@@ -1240,7 +1240,7 @@ Block/Cross-Axis Alignment: the 'align-self' property</h3>
 			<td>
 				Behaves as ''justify-self/stretch'',
 				except that items with an intrinsic size or aspect ratio are treated as ''justify-self/start''.
-				See <a href="https://www.w3.org/TR/css-grid-1/#grid-item-sizing">Grid Item Sizing</a> in [[!CSS-GRID-3]].
+				See <a href="https://www.w3.org/TR/css-grid-1/#grid-item-sizing">Grid Item Sizing</a> in [[!CSS-GRID-1]].
 	</table>
 
 <h3 id='place-self-property'>