Fix example root

MartheGjelstad · MartheGjelstad · commit ee21718c3718 · 2025-09-15T12:27:29.000+02:00
diff --git a/Nordic MathML Guidelines.md b/Nordic MathML Guidelines.md
@@ -512,7 +512,7 @@ Use `<mroot>` to mark up roots with different indeces.
 ```html
 <math>
     <mroot>
-        <mn>9</mn> <!-- the radicand -->
+        <mn>8</mn> <!-- the radicand -->
         <mn>3</mn> <!-- the index -->
     </mroot>
     <mo>=</mo>
