Bump actions/upload-artifact to v4 (#676)

* Bump `actions/upload-artifact` to v4

* Add sphinx.configuration key for RTD

* Bump `actions/upload-artifact` to v4 in check-release too

* bump download-artifact action

Author: arjxn-py

Diff for: .github/workflows/build.yml

@@ -77,7 +77,7 @@ jobs:
           yarn build:packages
 
       - name: Upload extension packages
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: extension-artifacts
           path: |
@@ -97,7 +97,7 @@ jobs:
           python-version: '3.9'
           architecture: 'x64'
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: extension-artifacts
 
@@ -140,7 +140,7 @@ jobs:
             pythonocc-core=7.7.0
 
       - name: Download extension package
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: extension-artifacts
 
@@ -223,7 +223,7 @@ jobs:
             jupyterlite-xeus
 
       - name: Download extension package
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: extension-artifacts
 

Diff for: .github/workflows/check-release.yml

@@ -31,7 +31,7 @@ jobs:
           shell: bash -l {0}
 
       - name: Upload Distributions
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: jupytercad-releaser-dist-${{ github.run_number }}
           path: .jupyter_releaser_checkout/dist

Diff for: .readthedocs.yaml

@@ -7,3 +7,6 @@ build:
 
 conda:
   environment: docs/environment.yml
+
+sphinx:
+  configuration: docs/source/conf.py