typings: fix declaration of primordials

PR-URL: #40222
Fixes: #40144
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>

typings/primordials.d.ts

@@ -24,7 +24,7 @@ type StaticApply<T extends (this: unknown, ...args: unknown[]) => unknown> =
  * primordials.StringPrototypeStartsWith('thing', 'hello')
  * ```
  */
-declare namespace primordials {
+declare namespace Primordials {
   export function uncurryThis<
       T extends (...args: unknown[]) => unknown
     > (fn: T):
@@ -527,3 +527,7 @@ declare namespace primordials {
   export const PromisePrototypeCatch: UncurryThis<typeof Promise.prototype.catch>
   export const PromisePrototypeFinally: UncurryThis<typeof Promise.prototype.finally>
 }
+
+declare global {
+  const primordials: typeof Primordials;
+}