Correct the millimeter unit conversion constant in docs (#3872)

Author: WardenDrew

docs/module-split_text_to_size.html

@@ -396,7 +396,7 @@ <h4 class="name" id="~getStringUnitWidth"><span class="type-signature">(inner) <
 <p>In other words, this is &quot;proportional&quot; value. For 1 unit of font size, the length
 of the string will be that much.</p>
 <p>Multiply by font size to get actual width in <em>points</em>
-Then divide by 72 to get inches or divide by (72/25.6) to get 'mm' etc.</p>
+Then divide by 72 to get inches or divide by (72/25.4) to get 'mm' etc.</p>
 </div>
 
 
@@ -759,4 +759,4 @@ <h5>Returns:</h5>
 
 
 </body>
-</html>
+</html>

docs/modules_split_text_to_size.js.html

@@ -152,7 +152,7 @@ <h1 class="page-title">modules/split_text_to_size.js</h1>
    * of the string will be that much.
    *
    * Multiply by font size to get actual width in *points*
-   * Then divide by 72 to get inches or divide by (72/25.6) to get 'mm' etc.
+   * Then divide by 72 to get inches or divide by (72/25.4) to get 'mm' etc.
    *
    * @name getStringUnitWidth
    * @public

src/modules/split_text_to_size.js

@@ -108,7 +108,7 @@ import { jsPDF } from "../jspdf.js";
    * of the string will be that much.
    *
    * Multiply by font size to get actual width in *points*
-   * Then divide by 72 to get inches or divide by (72/25.6) to get 'mm' etc.
+   * Then divide by 72 to get inches or divide by (72/25.4) to get 'mm' etc.
    *
    * @name getStringUnitWidth
    * @public