TEST-modin-project#7165: Add codecov token to fix CI on master (modin-project#7175)

Signed-off-by: sfc-gh-mvashishtha <mahesh.vashishtha@snowflake.com>

Author: sfc-gh-mvashishtha

.github/workflows/ci.yml

@@ -743,3 +743,4 @@ jobs:
       - uses: codecov/codecov-action@v4
         with:
           fail_ci_if_error: ${{ github.event_name == 'push' }}  # do not care about uploads in PR
+          token: ${{ secrets.CODECOV_TOKEN }} # this token is available at https://app.codecov.io/account/github/modin-project/