add comment on second install

Author: rcpeene

.github/workflows/build.yml

@@ -39,7 +39,10 @@ jobs:
       - name: Installing package
         run: pip install -e .
 
-      - name: Installing packages again (this prevents a weird error in cell matching nb)
+      # Some git-based dependencies (e.g., ophys-nway-matching) in requirements.txt
+      # are not reliably installed via `pip install -e .` due to setuptools limitations.
+      # This second install ensures all such dependencies are properly installed.
+      - name: Installing packages again (to avoid setuptools limitations)
         run: pip install -r requirements.txt
 
       - name: Installing build dependencies