Update Github actions 'upload-artifact' version

Author: jim-easterbrook

.github/workflows/build-linux-28.yml

@@ -61,7 +61,7 @@ jobs:
             cmake --install build-linux-release --config Release
 
       - name: Store results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: linux-28-wheels
           path: wheelhouse/*.whl

.github/workflows/build-macos-28.yml

@@ -45,7 +45,7 @@ jobs:
             cmake --install build-base_mac --config Release
 
       - name: Store results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: macos-28-wheels
           path: wheelhouse/*.whl

.github/workflows/build-macos-arm-28.yml

@@ -50,7 +50,7 @@ jobs:
             cmake --install build-base_mac --config Release
 
       - name: Store results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: macos-arm-28-wheels
           path: wheelhouse/*.whl

.github/workflows/build-windows-28.yml

@@ -63,7 +63,7 @@ jobs:
             copy build-msvc\bin\libcurl.dll build-msvc\install\bin
 
       - name: Store results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: windows-28-wheels
           path: wheelhouse/*.whl