Add note

_includes/selector.html

@@ -659,7 +659,7 @@
                         notes = [...notes, "TensorFlow requires CUDA 12."];
                     }
                     if (this.active_additional_packages.includes("NetworkX + nx-cugraph")) {
-                        notes = [...notes, "TODO: Write me!"];
+                        notes = [...notes, "Selecting this option will install both standard NetworkX and a GPU-accelerated backend by RAPIDS"];
                     }
                 }