temporarily remove 'try on colab' from the homepage (#9)

* temporarily remove 'try on colab' from the homepage

Colab updates seem to have broken compilation, and we are unable to get logs to fix it until we port to jitify2?

* Bump versions in CI

Author: ptheywood

.github/workflows/build.yaml

@@ -8,13 +8,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       # Clone the repository and checkout into the relevant branch
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       # Install Ruby
       - name: Install Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7.3 # Check https://pages.github.com/versions/ for the current Ruby version used by gh pages.
+          ruby-version: 3.3.4 # Check https://pages.github.com/versions/ for the current Ruby version used by gh pages.
 
       # Install dependencies required to run jekyll build
       - name: Install gh-pages rubygem via bundler

index.md

@@ -10,8 +10,8 @@ header:
       url: "https://github.com/FLAMEGPU/FLAMEGPU2/"
     - label: "Docs"
       url: "https://docs.flamegpu.com"
-    - label: "Try on Colab"
-      url: "https://colab.research.google.com/github/FLAMEGPU/FLAMEGPU2-tutorial-python/blob/google-colab/FLAME_GPU_2_python_tutorial.ipynb"
+    # - label: "Try on Colab"
+      # url: "https://colab.research.google.com/github/FLAMEGPU/FLAMEGPU2-tutorial-python/blob/google-colab/FLAME_GPU_2_python_tutorial.ipynb"
 excerpt: "The Flexible Large-scale Agent Modelling Environment for the Graphics Processing Unit (GPU)"
 feature_row:
   - image_path: /assets/images/gpu_birds_square.png