fix pr-link in changelog entry

Author: Oseltamivir

perf-changelog.yaml

@@ -3400,5 +3400,5 @@
     - dsr1-fp4-mi355x-sglang-disagg-8k1k-mtp
   description:
     - "Throwaway: conc-64-only gsm8k eval for DEP8+MTP3 to reproduce SGLANG_MORI_NUM_MAX_DISPATCH_TOKENS_PER_RANK < 256 corruption (dispatch=32 triggers broken All2All kernel, expect ~0% gsm8k). Not for merge."
-  pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/PENDING
+  pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/1659
   evals-only: true