[LinkV1] Simplify code to find child string of LinkV1 when setting a11yLabel (#3859)

* Check if we find a string as a child before calling .toString()

* Change files

* Simplify code to find child string of LinkV1

Author: ksiler

change/@fluentui-react-native-link-c18251d2-05a6-485f-a6bc-f471efef105e.json

@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "Simplify code to find child string of LinkV1",
+  "packageName": "@fluentui-react-native/link",
+  "email": "krsiler@microsoft.com",
+  "dependentChangeType": "patch"
+}

packages/components/Link/src/Link.tsx

@@ -49,12 +49,9 @@ export const Link = compose<LinkType>({
       // Views in Text, we use that to handle interactions instead.
       const supportsInteractionOnText = Platform.OS !== 'macos';
 
-      // Find the first child that's a string and save it to set as the link's
+      // Find the first child that's a string (if it exists) and save it to set as the link's
       // accessibilityLabel if one isn't defined.
-      let linkA11yLabel = '';
-      linkA11yLabel = React.Children.toArray(children)
-        .find((child) => typeof child === 'string')
-        .toString();
+      const linkA11yLabel = React.Children.toArray(children).find((child) => typeof child === 'string');
 
       return supportsA11yTextInText && supportsInteractionOnText && (inline || mergedProps.selectable) ? (
         <Slots.content {...mergedProps}>{children}</Slots.content>