Use proper cm unit in scaling tests

Previously the reference was misconfigured. The bug only now surfaced
when we made the references non-transparent

Author: HeikoBecker

code/languages/org.iets3.opensource/tests/test.ts.expr.os/models/[email protected]

@@ -7016,8 +7016,8 @@
         <node concept="_fku$" id="69HsIy5G$zO" role="_fkur" />
         <node concept="1QScDb" id="69HsIy5G$zP" role="_fkuY">
           <node concept="3EXbTZ" id="69HsIy5G$zQ" role="1QScD9">
+            <ref role="3EXiBN" to="ku0a:69HsIy5FvZe" resolve="cm" />
             <ref role="3EXiBM" to="ku0a:69HsIy5Fw98" resolve="conversion_m_cm (any)" />
-            <ref role="3EXiBN" node="2JXkwhJfQ5c" resolve="cm" />
           </node>
           <node concept="1YnStw" id="69HsIy5G$zR" role="30czhm">
             <node concept="CIsGf" id="69HsIy5G$zS" role="2c7tTI">