Create vale-linting.yml (#472)

* Create vale-linting.yml

* Markdown test

* Update vale-linting.yml

* Update index.md

Author: theletterf

.github/workflows/vale-linting.yml

@@ -0,0 +1,21 @@
+name: Vale Documentation Linting
+
+on:
+  pull_request:
+    paths:
+      - '**.md'
+      - '**.adoc'
+
+jobs:
+  vale:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+      
+      - name: Run Elastic Vale Linter
+        uses: elastic/vale-rules@main
+        with:
+          reporter: github-pr-review