ci : fix empty release_id in make-release upload step (#27516)

The 'Create release' step had no id, so steps.create_release.outputs.id
resolved to an empty string in the 'Upload nightly-tag.txt' step. The
uploadReleaseAsset call then hit /releases//assets and failed with HTTP
404 (Unhandled error: HttpError), e.g. run 32513839499.

Add id: create_release to the step; the action already exposes the id
output.

Assisted-by: pi:llama.cpp/Qwen3.8-27B

.github/workflows/make-release.yml

@@ -70,6 +70,7 @@ jobs:
           cat nightly-tag.txt
 
       - name: Create release
+        id: create_release
         if: ${{ github.event.inputs.dry_run == 'false' }}
         uses: ggml-org/action-create-release@v1
         env: