auto-publish for Level 2

.github/workflows/auto-publish.yml

@@ -0,0 +1,18 @@
+name: CI
+on:
+  pull_request: {}
+  push:
+    branches: [level-2]
+jobs:
+  main:
+    name: Build, Validate and Deploy
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: w3c/spec-prod@v2
+        with:
+          W3C_ECHIDNA_TOKEN: ${{ secrets.W3C_TR_TOKEN_L2 }}
+          W3C_WG_DECISION_URL: https://docs.google.com/document/d/12AAIbnkt_AH1YjZwUwxirX_7WA7aWOSXpDweCgfqIiQ/edit#heading=h.jc5tpbau2p7z
+          W3C_BUILD_OVERRIDE: |
+             shortName: trace-context-2
+             specStatus: CRD