Fix tooltip for save button on symbol dialog

Fix #10368

Author: m-kuhn

src/ui/qgssymbolv2selectordialogbase.ui

@@ -152,7 +152,7 @@
           </size>
          </property>
          <property name="toolTip">
-          <string>Move down</string>
+          <string>Save symbol</string>
          </property>
          <property name="text">
           <string>Save</string>