Updates missed GH upload-artifact action to v4 (#6961)

Follow-up to #6936, where I missed one occurrence of this deprecated
action.

As noted in the [migration
guide](https://github.com/actions/upload-artifact/blob/main/docs/MIGRATION.md#multiple-uploads-to-the-same-named-artifact),
the upload action can no longer be called with the same name more than
once within the same workflow, so the matrix values needs to be included
in the name.

.github/workflows/ci.yml

@@ -211,9 +211,9 @@ jobs:
             --out-dir /tmp/pip_package \
             ;
       - name: 'Upload'
-        uses: actions/upload-artifact@83fd05a356d7e2593de66fc9913b3002723633cb # v3.1.1
+        uses: actions/upload-artifact@v4
         with:
-          name: tensorboard-data-server
+          name: tensorboard-data-server_${{ matrix.mode }}_${{ matrix.platform }}_${{ matrix.rust_version }}
           path: /tmp/pip_package/*
 
   lint-python-flake8: