web/satellite: revert uploads queue size

Revert upload parallelism queue size back to 4 segments at a time.
Increasing this number causes some memory issues for some users.

Issue:
https://github.com/storj/storj/issues/6120

Change-Id: Ic5bcd1f13ee625fdc2613ee23d6945c905f03142

web/satellite/src/store/modules/objectBrowserStore.ts

@@ -464,8 +464,8 @@ export const useObjectBrowserStore = defineStore('objectBrowser', () => {
             appStore.setLargeUploadWarningNotification(true);
         }
 
-        // Upload 5 parts at a time.
-        const queueSize = 5;
+        // Upload 4 parts at a time.
+        const queueSize = 4;
         // Part size must be 64MB or higher, depending on file size.
         const partSize = Math.max(64 * 1024 * 1024, Math.floor(body.size / queueSize));