fix gh volume mount

Author: borisalekseev

.github/workflows/pr_tests.yaml

@@ -497,7 +497,7 @@ jobs:
         ports:
           - 1883:1883
         volumes:
-          - ./dev/mosquitto/mosquitto.conf:/mosquitto/config/mosquitto.conf
+          - ./dev/mosquitto/:/mosquitto/config/
     steps:
       - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with: