ci: update action dependencies

Author: DenizUgur

.github/workflows/publish.yml

@@ -35,7 +35,7 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Download output
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: output
           path: ./src/output

.github/workflows/test.yml

@@ -95,7 +95,7 @@ jobs:
 
       - name: Upload output
         if: inputs.upload
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: output
           path: ./src/output