noop(test infra) bugfix: coverage had too many --workspace flags

.gitlab-ci.yml

@@ -88,7 +88,7 @@ test:cov:
     - cargo llvm-cov --version  # Print version info for debugging
     - git --version && hg --version && jj --version  # vcst/domain-specific debug info
     # Same as test's steps, but run via code coverage instrumentor:
-    - RUSTFLAGS='-Ddeprecated -Dwarnings' cargo llvm-cov --workspace --all-features --workspace --text # --codecov  --output-path codecov.json
+    - RUSTFLAGS='-Ddeprecated -Dwarnings' cargo llvm-cov --all-features --workspace --text # --codecov  --output-path codecov.json
     # TODO: uncomment below, uncomment --output-path above, delete --text. We
     # can do this once we're public. Until then, this will always fail per
     # https://github.com/codecov/codecov-action/issues/1671#issuecomment-2486953810