🤖 Merge PR #48444 [echarts] Update supported options for `echartsInstance.showLoading` method by @Ky6uk
🤖 Merge PR #48444 [echarts] Update supported options for `echartsInstance.showLoading` method by @Ky6uk

* Update supported options

`echartsInstance.showLoading` supports more options since `v4.8.0`

* Update index.d.ts
georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,markogresak/DefinitelyTyped