Fix the import of node-fetch polyfill (#5399)

* Fix the import of node-fetch polyfill

* Adding changeset

Author: jamesdaniels

.changeset/twelve-items-wonder.md

@@ -0,0 +1,6 @@
+---
+'@firebase/firestore': patch
+'@firebase/storage': patch
+---
+
+Addressed incorrect use of the `node-fetch` polyfill

packages/firestore/src/platform/node_lite/connection.ts

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-import * as nodeFetch from 'node-fetch';
+import nodeFetch from 'node-fetch';
 
 import { DatabaseInfo } from '../../core/database_info';
 import { Connection } from '../../remote/connection';

packages/storage/src/platform/node/connection.ts

@@ -17,7 +17,7 @@
 
 import { ErrorCode, Connection } from '../../implementation/connection';
 import { internalError } from '../../implementation/error';
-import * as nodeFetch from 'node-fetch';
+import nodeFetch from 'node-fetch';
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 const fetch: typeof window.fetch = nodeFetch as any;