Upgrade actions/upload-artifact and actions/download-artifact to v4

The workflow do not upload multiple artifacts under the same 'name', so
it can be easily upgraded to v4 without the need to handle breaking
changes.

Author: cmaglie

workflow-templates/publish-go-tester-task.yml

@@ -131,7 +131,7 @@ jobs:
 
       # Transfer builds to artifacts job
       - name: Upload build artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           path: ${{ env.DIST_DIR }}/${{ matrix.os.path }}
           name: ${{ matrix.os.name }}
@@ -146,7 +146,7 @@ jobs:
 
     steps:
       - name: Download build artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
 
       - name: Create checksum file
         run: |
@@ -161,7 +161,7 @@ jobs:
           done
 
       - name: Upload checksum artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           path: ./*checksums.txt
           name: checksums