ci: changed windows_tests timeout-minutes to 30 (fixes #1575) (#1576)

* fixes #1575

Author: shoneriki

.github/workflows/testing.yml

@@ -155,7 +155,7 @@ jobs:
     strategy:
       matrix:
         python: ['3.9', '3.10']
-    timeout-minutes: 20
+    timeout-minutes: 30
     env:
       NO_EXIT_CVE_NUM: 1
       PYTHONIOENCODING: 'utf8'