Revert to upload/download v3

v4 why are you so difficult

Author: milesgranger

.github/workflows/CI.yml

@@ -290,7 +290,7 @@ jobs:
     permissions:
       id-token: write
     steps:
-    - uses: actions/download-artifact@v4.1.7
+    - uses: actions/download-artifact@v3
       with:
         name: dist
     - name: List artifacts
@@ -309,7 +309,7 @@ jobs:
     needs: [build-test, build-sdist]
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/download-artifact@v4.1.7
+    - uses: actions/download-artifact@v3
       with:
         name: dist
     - name: List artifacts