chore(deps): update grafana/otel-lgtm docker tag to v0.20.0 (#1046)

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

Author: renovate[bot]

logging-k8s-stdout-otlp-json/k8s/lgtm.yaml

@@ -47,7 +47,7 @@ spec:
     spec:
       containers:
         - name: lgtm
-          image: grafana/otel-lgtm:0.19.1@sha256:47bda08f5cbfe1096ce2a146ab46b2d1331b654f9037c9797cfe77363ead8078
+          image: grafana/otel-lgtm:0.20.0@sha256:d3683fa0629ad8c8ab20230657637600aeb42141975e635bab3299b28e5a49c0
           ports:
             - containerPort: 3000
             - containerPort: 4317