Update grafana/tempo:latest Docker digest to bbb7c84 (#56)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| grafana/tempo | digest | `cb09d25` -> `bbb7c84` |

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### Configuration

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Reviewed-on: #56
Co-authored-by: Renovate Bot <renovate-bot@valverde.cloud>
Co-committed-by: Renovate Bot <renovate-bot@valverde.cloud>

compose.yml

@@ -48,7 +48,7 @@ services:
 
   tempo:
     <<: *service-base
-    image: grafana/tempo:latest@sha256:cb09d2518204d0269db8a8fd1eb4655873a8392566fe35c10534ca53d09580e5
+    image: grafana/tempo:latest@sha256:bbb7c84ba5b9d03203aa7f35c038ea2e770336e041dc0eecb0798d4d7fcac15b
     command: [-config.file=/etc/tempo.yaml]
     volumes:
       - ./telemetry/tempo.yaml:/etc/tempo.yaml