Disable scheduled workflow to be run in fork repos

Author: antonwolfy

.github/workflows/run-tests-from-dppy-bits.yaml

@@ -19,6 +19,9 @@ env:
 
 jobs:
   test_linux:
+    # disable scheduled workflow to be run in forks
+    if: github.event.repository.fork == false
+
     runs-on:  ${{ matrix.runner }}
     timeout-minutes: 45