chore: fill in pr-link for #1445 in perf-changelog

Author: functionstackx

perf-changelog.yaml

@@ -2634,4 +2634,4 @@
     - qwen3.5-fp4-mi355x-sglang-mtp
   description:
     - "Add MI355X config: qwen3.5-fp4-sglang-mtp using lmsysorg/sglang-rocm:v0.5.12-rocm720-mi35x-20260517"
-  pr-link: PLACEHOLDER
+  pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/1445