fix: actually deploy the docs

.github/workflows/docs.yml

@@ -7,9 +7,16 @@ on:
       - "**.exs"
       - "**.md"
       - ".github/workflows/docs.yml"
+    branches:
+      - main
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
 
 jobs:
-  docs:
+  build:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -23,3 +30,18 @@ jobs:
       - uses: actions/upload-pages-artifact@v3
         with:
           path: ./doc
+      - uses: actions/deploy-pages@v4
+
+  deploy:
+    concurrency:
+      group: "pages"
+      cancel-in-progress: true
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4