[FIXUP] CI: Improve comments on skipping zstd benchmarks

Internal-tag: [#52186]
Signed-off-by: Pawel Czarnecki <pczarnecki@antmicro.com>

.github/workflows/continuous-integration.yml

@@ -42,6 +42,7 @@ jobs:
       - name: Bazel Test All (opt)
         run: |
           # Explicitly build the whole XLS except the benchmarking targets for the ZSTD module
+          # Avoid running long place_and_route benchmarks in the main CI workflow
           bazel build -c opt --noshow_progress --test_output=errors -- //xls/... -//xls/modules/zstd/benchmarks/...
           # Test everything except ZSTD module, this is done in a separate workflow
           bazel test -c opt --noshow_progress --test_output=errors -- //xls/... -//xls/modules/zstd/...