fix: add final newline to original perf-changelog.yaml so that there wont be erroneous negative diff [skip-sweep] (#333)

Author: cquil11

perf-changelog.yaml

@@ -80,4 +80,4 @@
   description: |
     - Update vLLM image for NVIDIA configs from vLLM 0.11.0 to vLLM 0.11.2
     - Adds kv-cache-dtype: fp8 to benchmarks/gptoss_fp4_b200_docker.sh
-    PR: https://github.com/InferenceMAX/InferenceMAX/pull/273
+    PR: https://github.com/InferenceMAX/InferenceMAX/pull/273