chore: bump @grafana/create-plugin configuration to 5.26.4 (#2082)

Bumps
[`@grafana/create-plugin`](https://github.com/grafana/plugin-tools/tree/main/packages/create-plugin)
configuration from 4.2.1 to 5.26.4.

**Notes for reviewer:**
This is an auto-generated PR which ran `@grafana/create-plugin update`.
Please consult the create-plugin
[CHANGELOG.md](https://github.com/grafana/plugin-tools/blob/main/packages/create-plugin/CHANGELOG.md)
to understand what may have changed.
Please review the changes thoroughly before merging.

---------

Co-authored-by: grafana-plugins-platform-bot[bot] <144369747+grafana-plugins-platform-bot[bot]@users.noreply.github.com>
Co-authored-by: Zoltán Bedi <zoltan.bedi@gmail.com>

pkg/zabbixapi/zabbix_api_72_integration_test.go

@@ -155,7 +155,7 @@ func TestIntegrationZabbixAPI72(t *testing.T) {
 		// Try to authenticate
 		_, err = apiWithBasicAuth.Request(context.Background(), "hostgroup.get", params, zabbixVersion)
 		require.Error(t, err)
-		assert.Contains(t, err.Error(), "Basic Auth is not supported for Zabbix v7.2 and later")
+		assert.Contains(t, err.Error(), "basic auth is not supported for Zabbix v7.2 and later")
 		assert.True(t, backend.IsDownstreamError(err))
 	})
 }