Update disassociate button variant

Update disassociate button variant.

See: https://github.com/ansible/awx/issues/7041

Also: https://tower-mockups.testing.ansible.com/patternfly/instance-groups/instance-groups-instances/

awx/ui_next/src/components/DisassociateButton/DisassociateButton.jsx

@@ -61,7 +61,7 @@ function DisassociateButton({
       <Tooltip content={renderTooltip()} position="top">
         <div>
           <Button
-            variant="danger"
+            variant="secondary"
             aria-label={i18n._(t`Disassociate`)}
             onClick={() => setIsOpen(true)}
             isDisabled={isDisabled}