Don't use GitHub as CDN - Fixes #691

src/modules/beam/BeamExplainer.tsx

@@ -23,7 +23,7 @@ It's like having a brainstorm session with several smart people,
 each adding their own unique perspective.
 Beam lets you make the best of them all.
 
-![big-AGI BEAM Rays](https://raw.githubusercontent.com/enricoros/big-AGI/v2-dev/public/images/explainers/explainer-beam-scatter-1200px-alpha.png)
+![big-AGI BEAM Rays](https://big-agi.com/app/journeys/beam/explainer-beam-scatter-1200px-alpha.png)
 
 `, // Let's get you to better chat answers, faster.
   },
@@ -56,7 +56,7 @@ Merging is **combining the best parts of each response** into a great, coherent
 You can choose from various merge options, including **Fusion**, **Checklist**, **Compare**, and **Custom**.
 Experiment with different options to find the one that works best for your chat.
 
-![big-AGI BEAM Rays](https://raw.githubusercontent.com/enricoros/big-AGI/v2-dev/public/images/explainers/explainer-beam-gather-1600px-alpha.png)
+![big-AGI BEAM Rays](https://big-agi.com/app/journeys/beam/explainer-beam-gather-1600px-alpha.png)
     `, // > Merge until you have a single, high-quality response. Or choose the final response manually, skipping merge.
   },
 //   {