✨ add colab link

Signed-off-by: peter szemraj <peterszemraj@gmail.com>

app.py

@@ -489,7 +489,15 @@ if __name__ == "__main__":
     with demo:
         gr.Markdown("# Document Summarization with Long-Document Transformers")
         gr.Markdown(
-            "An example use case for fine-tuned long document transformers. Model(s) are trained on [book summaries](https://hf.co/datasets/kmfoda/booksum). Architectures [in this demo](https://hf.co/spaces/pszemraj/document-summarization) are [LongT5-base](https://hf.co/pszemraj/long-t5-tglobal-base-16384-book-summary) and [Pegasus-X-Large](https://hf.co/pszemraj/pegasus-x-large-book-summary)."
+            """An example use case for fine-tuned long document transformers. Model(s) are trained on [book summaries](https://hf.co/datasets/kmfoda/booksum). Architectures [in this demo](https://hf.co/spaces/pszemraj/document-summarization) are [LongT5-base](https://hf.co/pszemraj/long-t5-tglobal-base-16384-book-summary) and [Pegasus-X-Large](https://hf.co/pszemraj/pegasus-x-large-book-summary).
+
+            **Want more performance? Run this demo from a free Google Colab GPU:**.
+            <br>
+            <a href="https://colab.research.google.com/gist/pszemraj/52f67cf7326e780155812a6a1f9bb724/document-summarization-on-gpu.ipynb">
+            <img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"/>
+            </a>
+            <br>
+            """
         )
         with gr.Column():
             gr.Markdown("## Load Inputs & Select Parameters")