Added overwrite option to uplaod artifact task.

Author: sipsorcery

.github/workflows/datachannel_echo-test.yml

@@ -65,6 +65,7 @@ jobs:
       - name: Download results
         uses: actions/download-artifact@v4
         with:
+          overwrite: true
           name: results
       - name: Collate result files
         run: |

.github/workflows/peerconnection-test.yml

@@ -67,6 +67,7 @@ jobs:
       - name: Upload result
         uses: actions/upload-artifact@v2
         with:
+          overwrite: true
           name: results
           path: |
             ${{ matrix.server }}_${{ matrix.client }}_result.csv