Reword Colab setup: "packages Colab does not ship" -> "packages that aren't already on Colab"

Plainer language in the Colab setup cell's guidance and comment; no behavior change.

Author: Corey-Abramson

visualization_toolkit_final.ipynb

@@ -39,7 +39,7 @@
    "source": [
     "## Colab setup (run first)\n",
     "\n",
-    "Running on **Google Colab**? Run the next cell first — it clones the toolkit repo (for the `function/` modules and the sample `data/data.csv`) and installs the few packages Colab does not ship. It does nothing outside Colab, so a local install is unaffected. Then continue with **Setup** below."
+    "Running on **Google Colab**? Run the next cell first — it clones the toolkit repo (for the `function/` modules and the sample `data/data.csv`) and installs the few packages that aren't already on Colab. It does nothing outside Colab, so a local install is unaffected. Then continue with **Setup** below."
    ]
   },
   {
@@ -52,8 +52,8 @@
     "# =============================================================================\n",
     "# COLAB SETUP (RUN FIRST ON COLAB)\n",
     "# On Google Colab this clones the toolkit repo so the `function/` package and\n",
-    "# the sample `data/data.csv` are on disk, then installs the packages Colab does\n",
-    "# not ship. It is a NO-OP outside Colab, so local (conda / Jupyter) runs are\n",
+    "# the sample `data/data.csv` are on disk, then installs the packages that\n",
+    "# aren't already on Colab. It is a NO-OP outside Colab, so local (conda / Jupyter) runs are\n",
     "# unaffected. Colab's preinstalled torch / transformers / numpy / pandas / scipy\n",
     "# / scikit-learn stack is left untouched (avoids a slow, CUDA-breaking downgrade).\n",
     "# =============================================================================\n",