Make a few minor corrections to resources.

- Changes Google Collab to Colab
- Updates the URL for the vcokltfre tutorial
- Adds a category icon for Game Development.

Author: lemonsaurus

pydis_site/apps/resources/resources/google_collab.yaml renamed to pydis_site/apps/resources/resources/google_colab.yaml

@@ -1,8 +1,8 @@
-description: Google Collab is a high-powered custom version of Jupyter Notebook which supports e.g.
+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 Collab Notebooks with other people and work collaboratively.
-name: Google Collab
+  You can share your Colab Notebooks with other people and work collaboratively.
+name: Google Colab
 title_url: https://colab.research.google.com/notebooks/intro.ipynb
 tags:
   topics:

pydis_site/apps/resources/resources/vcokltfre_discord_bot_tutorial.yaml

@@ -2,7 +2,7 @@ description: This tutorial, written by Python Discord staff member vcokltfre,
   will walk you through all the aspects of creating your own Discord bot,
   starting from from creating the bot user itself.
 name: vcokltfre's Discord Bot Tutorial
-title_url: https://vcokltfre.dev/
+title_url: https://tutorial.vcokltfre.dev/
 tags:
   topics:
     - discord bots

pydis_site/apps/resources/templatetags/get_category_icon.py

@@ -12,7 +12,7 @@
     "Databases": "fa-server",
     "Discord Bots": "fa-robot",
     "Free": "fa-first-aid",
-    "Game Development": "fa-joystick",
+    "Game Development": "fa-gamepad",
     "General": "fa-book",
     "Interactive": "fa-mouse-pointer",
     "Intermediate": "fa-align-center",