semi-weekly test: increase dfl timeo to 10

In Win `uv.exe -v` timeouted. But first run in Windows takes usually
more time (maybe Windows Defender scan or so).

So increased the timeout to 10 seconds - not just because of this but
in these places where UG should run some time, it may be useful to run
a bit longer. The tests take just a negligible time, anyaways.

Author: MartinPulec

.github/scripts/run_scheduled_tests.sh

@@ -101,9 +101,9 @@ while [ $i -lt $test_count ]; do
                 fi
         fi
 
-        timeout=5
+        timeout=10
         echo "Starting: \"timeout $timeout $exec $args\""
-        timeout -k 10 $timeout $exec $args
+        timeout -k $((timeout+5)) $timeout $exec $args
         rc=$?
         echo "Finished: \"timeout $timeout $exec $args\" with RC $rc"