chore(deps): update grafana/loki docker tag to v3.5.6

Author: renovate[bot]

build-images.sh

@@ -10,7 +10,7 @@ container=$(buildah from scratch)
 buildah add "${container}" imageroot /imageroot
 buildah add "${container}" ui /ui
 buildah config --entrypoint=/ \
-	--label="org.nethserver.images=docker.io/traefik:v3.3.5 docker.io/grafana/loki:3.4.3" \
+	--label="org.nethserver.images=docker.io/traefik:v3.3.5 docker.io/grafana/loki:3.5.6" \
 	--label="org.nethserver.min-core=3.2.0-0" \
 	--label="org.nethserver.tcp-ports-demand=1" \
     --label='org.nethserver.flags=core_module' \