Fix 500 error with long report_name

Fixes 500 error, when run_name + iso_time > 100 symbols

Related-PROD: PRODX-6279
Change-Id: I62cf19f7474b229412c8e2520c5a332476502b5a
diff --git a/testrail_bot/control/models.py b/testrail_bot/control/models.py
index fc4af58..b79836a 100644
--- a/testrail_bot/control/models.py
+++ b/testrail_bot/control/models.py
@@ -17,7 +17,7 @@
 
 
 class Report(models.Model):
-    path = models.FileField(storage=fs, null=True, blank=True)
+    path = models.FileField(storage=fs, null=True, blank=True, max_length=500)
     test_run = models.ForeignKey(TestRun, on_delete=models.CASCADE)
     report_name = models.CharField(max_length=300)
     finished = models.BooleanField(default=False)