ENGCOM-1489: [Forwardport] Renamed 'Add Block Names to Hints' config setting to represent what it actually does #15080

 - Merge Pull Request #15080 from adrian-martinez-interactiv4/magento2:2.3-develop-PR-port-14939
 - Merged commits:
   1. 7238228

Author: magento-engcom-team

app/code/Magento/Backend/etc/adminhtml/system.xml

@@ -136,7 +136,7 @@
                     <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                 </field>
                 <field id="template_hints_blocks" translate="label" type="select" sortOrder="21" showInDefault="1" showInWebsite="1" showInStore="1">
-                    <label>Add Block Names to Hints</label>
+                    <label>Add Block Class Type to Hints</label>
                     <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                 </field>
             </group>