Update .github/workflows/integration-test.yml

Author: bkontur

.github/workflows/integration-test.yml

@@ -210,6 +210,7 @@ jobs:
         run: |
           export TEST_DIR="$(mktemp -d $GITHUB_WORKSPACE/bulletin-tests-run-XXXXX)/test"
           echo "TEST_DIR=$TEST_DIR" >> $GITHUB_ENV
+          mkdir -p "$TEST_DIR"
           just run-store-big-data
 
       # Collects logs from the last failed zombienet run.