Update ghcr.io/scicatproject/backend-next Docker tag to v4.9.1 (#416)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

services/backend/services/v4/compose.base.yaml

@@ -1,6 +1,6 @@
 services:
   backend:
-    image: ghcr.io/scicatproject/backend-next:v4.9.0
+    image: ghcr.io/scicatproject/backend-next:v4.9.1
     depends_on:
       mongodb:
         condition: service_started