Fix PDF build in CI

Added workflow for building PDF. Progress.

Signed-off-by: nopeitsnothing <no@anonymousplanet.org>

.github/workflows/build-pdf.yml

@@ -1,4 +1,4 @@
-name: 🚀 Build guide PDF
+name: 📖 Build PDF
 
 on:
   workflow_dispatch:
@@ -26,10 +26,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.12"
 
@@ -47,7 +47,7 @@ jobs:
         run: python scripts/build_guide_pdf.py
 
       - name: Upload PDF artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: guide-pdf
           path: export/guide.pdf