fix: release lnbits-boltz with proper tag (#3674)

.github/workflows/docker.yml

@@ -62,3 +62,4 @@ jobs:
             platforms: linux/amd64,linux/arm64
             cache-from: type=local,src=/tmp/.buildx-cache
             cache-to: type=local,dest=/tmp/.buildx-cache
+            build-args: LNBITS_TAG=${{ inputs.tag }}

Dockerfile.boltz

@@ -1,6 +1,7 @@
-FROM boltz/boltz-client:latest AS boltz
+ARG LNBITS_TAG=latest
 
-FROM lnbits/lnbits:latest
+FROM boltz/boltz-client:latest AS boltz
+FROM lnbits/lnbits:${LNBITS_TAG}
 
 COPY --from=boltz /bin/boltzd /bin/boltzcli /usr/local/bin/
 RUN ls -l /usr/local/bin/boltzd