Coverity CI: add additional run on Friday

In addition to the Tuesday to eventually catch problems merged during
the week.

Author: MartinPulec

.github/workflows/coverity-scan.yml

@@ -1,11 +1,14 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2020-2026 CESNET, zájmové sdružení právnických osob
+
 name: coverity-scan
 
 on:
   push:
     branches:
       - coverity_scan
   schedule:
-   - cron:  '0 4 * * 2' # Tuesday at 4:00 UTC
+   - cron:  '0 4 * * 2,5' # Tu,Fr at 4:00 UTC
 
 jobs:
   Coverity: