Fix demo notebook link and improve formatting (#46)

Author: J22Melody

README.md

@@ -54,9 +54,11 @@ DTWp.score(hypothesis, reference)
 
 ### Demo Notebook
 
-For a demonstration of how to use the package, see the [demo notebook](examples\Pose_Evaluation_Example.ipynb)
-<a target="_blank" href="https://colab.research.google.com/github/github.com/sign-language-processing/pose-evaluation/examples/Pose_Evaluation_Example.ipynb">
-<img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"/>
+For a demonstration of how to use the package, see the
+[demo notebook](examples/Pose_Evaluation_Example.ipynb):
+
+<a target="_blank" href="https://colab.research.google.com/github/sign-language-processing/pose-evaluation/blob/main/examples/Pose_Evaluation_Example.ipynb">
+  <img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"/>
 </a>
 
 Demonstrates: