fix property name

It turns out that the warning about the dynamic property was in fact an existing property name that was typed incorrectly.

scripts/translation/lib/RevcheckFileItem.php

@@ -19,7 +19,6 @@
 
 require_once __DIR__ . '/all.php';
 
-#[\AllowDynamicProperties]
 class RevcheckFileItem
 {
     public string $file = ""; // from fs
@@ -63,7 +62,7 @@ public function addGitLogData( string $hash , string $date , bool $skip ) : void
         }
 
         if ( $skip )
-            $this->diffHash = $hash;
+            $this->hashDiff = $hash;
         else
             $this->hashStop = true;
     }