fix: colab link

Author: KevinEloff

README.md

@@ -1,7 +1,7 @@
 # _De novo_ peptide sequencing with InstaNovo
 
 [![PyPI version](https://badge.fury.io/py/instanovo.svg)](https://badge.fury.io/py/instanovo)
-<a target="_blank" href="https://colab.research.google.com/github/https://colab.research.google.com/github/instadeepai/InstaNovo/blob/main/notebooks/getting_started_with_instanovo.ipynb">
+<a target="_blank" href="https://colab.research.google.com/github/instadeepai/InstaNovo/blob/main/notebooks/getting_started_with_instanovo.ipynb">
   <img src="https://colab.research.google.com/assets/colab-badge.svg" alt="Open In Colab"/>
 </a>