Fix flaky ProjectsPageTest (#3373)

One of the tests added in #3368 is
flaky.

Author: williamjallen

tests/Browser/Pages/ProjectsPageTest.php

@@ -220,7 +220,7 @@ public function testShowsDateOfLastSubmission(): void
             'siteid' => $this->site->id,
             'name' => Str::uuid()->toString(),
             'uuid' => Str::uuid()->toString(),
-            'submittime' => Carbon::now()->subWeek(),
+            'submittime' => Carbon::now()->subWeek()->subHour(),
         ]);
 
         $this->browse(function (Browser $browser): void {