Update perf.yml token used to access perf repo (#4919)

.github/workflows/performance.yml

@@ -14,7 +14,6 @@ on:
 # Env variables
 env:
   SG_COMMIT: b4971ae
-  TOKEN: ${{ secrets.SIGHTGLASS_BENCHMARKING_TOKEN }}
   GITHUB_CONTEXT: ${{ toJson(github) }}
 
 jobs:
@@ -39,7 +38,7 @@ jobs:
       - run: echo "$GITHUB_CONTEXT"
       - run: |
           # Create and Push Branch
-          git clone https://jlb6740:${{env.TOKEN}}@github.com/bytecodealliance/wasmtime-sightglass-benchmarking.git
+          git clone https://wasmtime-publish:${{secrets.PERSONAL_ACCESS_TOKEN}}@github.com/bytecodealliance/wasmtime-sightglass-benchmarking.git
           cd wasmtime-sightglass-benchmarking
           git remote add wasmtime ${{ github.event.repository.clone_url }}
           git fetch wasmtime refs/pull/*/merge:refs/remotes/wasmtime/pull/*/merge