Use version 2 of the deploy preview workflow (#101266)

* Use v2 deploy preview

Supports building with multiple documentation sources together.

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Lint a file

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

---------

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

.github/workflows/deploy-pr-preview.yml

@@ -11,14 +11,21 @@ on:
 
 jobs:
   deploy-pr-preview:
-    if: ${{ ! github.event.pull_request.head.repo.fork }}
+    if: "!github.event.pull_request.head.repo.fork"
     uses: grafana/writers-toolkit/.github/workflows/deploy-preview.yml@main
     with:
-      sha: ${{ github.event.pull_request.head.sha }}
       branch: ${{ github.head_ref }}
       event_number: ${{ github.event.number }}
-      title: ${{ github.event.pull_request.title }}
       repo: grafana
-      website_directory: content/docs/grafana/latest
-      relative_prefix: /docs/grafana/latest/
-      index_file: true
+      sha: ${{ github.event.pull_request.head.sha }}
+      sources: |
+        [
+          {
+            "index_file": "content/docs/grafana/_index.md",
+            "relative_prefix": "/docs/grafana/latest/",
+            "repo": "grafana",
+            "source_directory": "docs/sources",
+            "website_directory": "content/docs/grafana/latest"
+          }
+        ]
+      title: ${{ github.event.pull_request.title }}