fix: guarding replaceSpecialCharacters against non-strings

Author: mattConnHarbour

packages/super-editor/src/core/super-converter/exporter.js

@@ -2283,7 +2283,10 @@ export class DocxExporter {
     if (elements) {
       if (name === 'w:instrText') {
         tags.push(elements[0].text);
-      } else if (name === 'w:t' || name === 'w:delText' || name === 'wp:posOffset') {
+      } else if (
+        (name === 'w:t' || name === 'w:delText' || name === 'wp:posOffset') &&
+        typeof elements[0].text === 'string'
+      ) {
         const text = this.#replaceSpecialCharacters(elements[0].text);
         tags.push(text);
       } else {