[None][infra] Set the label community action to only run on upstream TRTLLM (#5806)

Signed-off-by: Po-Wei Wang (Vincent) <poweiw@nvidia.com>

Author: poweiw

.github/workflows/label_community_pr.yml

@@ -14,6 +14,7 @@ on:
 jobs:
  label_pr:
  runs-on: ubuntu-latest
+ if: github.repository == 'NVIDIA/TensorRT-LLM'
  steps:
  - name: Checkout repository
  uses: actions/checkout@v3