fix duplicated caption

Signed-off-by: Thomas Fossati <thomas.fossati@linaro.org>

Author: thomas-fossati

draft-ietf-rats-reference-interaction-models.md

@@ -905,7 +905,7 @@ Verifiers appraise the Evidence and publish the Attestation Result to topic "Att
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-{: #fig-streaming-with-broker-evidence-gen title="Figure 9: Attestation Result Generation for Remote Attestation over Publish-Subscribe"}
+{: #fig-streaming-with-broker-ar-gen title="Figure 9: Attestation Result Generation for Remote Attestation over Publish-Subscribe"}
 
 
 Attestation Result Generation is the same for both publish-subscribe models,*Challenge/Response Remote Attestation over Publish-Subscribe* and *Uni-Directional Remote Attestation over Publish-Subscribe*.