docs: Update splitbutton.yml

Update spectrum link

Author: csantos1113

components/splitbutton/metadata/splitbutton.yml

@@ -1,5 +1,5 @@
 name: Split button
-description: Instead of a single split button (now a deprecated component), use a button group to show any additional actions related to the most critical action. Reference [Spectrum documentation](https://spectrum.corp.adobe.com/page/button-group/#Use-a-button-group-to-show-additional-actions) for more information.
+description: Instead of a single split button (now a deprecated component), use a button group to show any additional actions related to the most critical action. Reference [Spectrum documentation](https://spectrum.adobe.com/page/button-group/#Use-a-button-group-to-show-additional-actions) for more information.
 sections:
   - name: Migration Guide
     description: |