update from v3 to v4 for github actions (#24619)

fixes #24398

Author: eleanorjboyd

.github/actions/build-vsix/action.yml

@@ -87,7 +87,7 @@ runs:
       shell: bash
 
     - name: Upload VSIX
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: ${{ inputs.artifact_name }}
         path: ${{ inputs.vsix_name }}

.github/actions/smoke-tests/action.yml

@@ -43,7 +43,7 @@ runs:
 
     # Bits from the VSIX are reused by smokeTest.ts to speed things up.
     - name: Download VSIX
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         name: ${{ inputs.artifact_name }}