[3.10] gh-129641: Switch Docs GHA build to actions/upload-artifact@v4

Add options for backwards compatibility, from the docs at:
https://github.com/actions/upload-artifact?tab=readme-ov-file#breaking-changes

Author: encukou

.github/workflows/doc.yml

@@ -46,10 +46,12 @@ jobs:
     - name: 'Build HTML documentation'
       run: make -C Doc/ SPHINXOPTS="-q" SPHINXERRORHANDLING="-W --keep-going" html
     - name: 'Upload'
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: doc-html
         path: Doc/build/html
+        include-hidden-files: true
+        overwrite: true
 
   # Run "doctest" on HEAD as new syntax doesn't exist in the latest stable release
   doctest: