Fix incorrect typing on SdkConfig defaults (matrix-org#8147)

It's not a partial anymore - it's a full-fledged object with proper types.

Without this change, `SdkConfig.put(DEFAULTS)` is broken.

Author: turt2live

src/SdkConfig.ts

@@ -22,7 +22,7 @@ import { IConfigOptions, ISsoRedirectOptions } from "./IConfigOptions";
 import { KeysWithObjectShape } from "./@types/common";
 
 // see element-web config.md for docs, or the IConfigOptions interface for dev docs
-export const DEFAULTS: Partial<IConfigOptions> = {
+export const DEFAULTS: IConfigOptions = {
     brand: "Element",
     integrations_ui_url: "https://scalar.vector.im/",
     integrations_rest_url: "https://scalar.vector.im/api",