MAINT: add a comment explaining why we are doing this

Author: ngoldbaum

.github/workflows/linux_blas.yml

@@ -111,6 +111,8 @@ jobs:
       shell: 'script -q -e -c "bash --noprofile --norc -eo pipefail {0}"'
       env:
         TERM: xterm-256color
+      # TODO: remove when scipy-openblas nightly tests aren't failing anymore.
+      # xref gh-26824
       continue-on-error: true
       run: |
         pip install pytest pytest-xdist hypothesis typing_extensions