GHA: Update actions/upload-artifact to v4

.github/workflows/python.yml

@@ -172,7 +172,7 @@ jobs:
         run: ls dist/*
 
       - name: Save Artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: epicscorelibs
           path: dist/*
@@ -380,7 +380,7 @@ jobs:
         run: ls dist/*
 
       - name: Save Artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: epicscorelibs
           path: dist/*