Rewrite Google Colab resource to emphasize GPU computation

Previously, it was unclear why this was a data science resource. This version states that Colab offers GPU computation and that it can be used for deep learning, which is the reason. Also fixes abrupt change in sentence structure ("a ... Jupyter Notebook which supports e.g. !apt-get"; "e.g." unexpected).

Also, expressions in backticks (apt-get) won't be rendered as code, though since Colab is mostly a beginner sandbox, I don't think the word "Debian" will often be known.

Author: swfarnsworth

pydis_site/apps/resources/resources/google_colab.yaml

@@ -1,7 +1,7 @@
-description: Google Colab is a high-powered custom version of Jupyter Notebook which supports e.g.
-  !apt-get to install arbitrary Debian packages to the runtime, which is very generous with CPU and memory,
-  and well-integrated with Google Drive.
-  You can share your Colab Notebooks with other people and work collaboratively.
+description: Google Colab is a custom version of Jupyter Notebook that runs code in the cloud, allowing you to
+  share your Colab notebooks with other people and work collaboratively.
+  Colab offers a generous amount of memory and computation time for free, and allows you to run programs on GPUs,
+  making it a great deep learning sandbox for beginners.
 name: Google Colab
 title_url: https://colab.research.google.com/notebooks/intro.ipynb
 tags: