Create lint-vocab.yml in workflows

This is the PR-actionable part of #157 (comment). Note that extra actions are needed to be done by the maintainer of the repository to ensure that the result of the github actions determine the content of gh-pages.

.github/workflows/lint-vocab.yml

@@ -0,0 +1,22 @@
+name: Lint VC Vocabulary
+on:
+  pull_request:
+    paths:
+    - 'vocab/security/vocabulary.yml'
+    - 'vocab/security/template.html'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup environment
+        uses: actions/checkout/@v3
+      - name: Setup Node 16
+        uses: actions/setup-node@v3
+        with:
+          node-version: 16
+      - name: Lint Security Vocabulary
+        run: |
+          npm install yml2vocab
+          npm update yml2vocab
+          ./node_modules/.bin/yml2vocab -v vocab/vocabulary.yml -t vocab/template.html