docs: drop image, link the demo video

Co-authored-by: CommandCodeBot <noreply@commandcode.ai>

Author: ahmadawais

.github/workflows/demo.mp4 .github/demo.mp4.github/workflows/demo.mp4 renamed to .github/demo.mp4

@@ -1,8 +1,6 @@
 # cmd-mod-jev-nudge
 
-[![Watch the demo](https://raw.githubusercontent.com/CommandCodeAI/cmd-mod-jev-nudge/refs/heads/main/.github/workflows/image.png)](https://github.com/CommandCodeAI/cmd-mod-jev-nudge/raw/main/.github/workflows/demo.mp4)
-
-▶ [Watch the demo](https://github.com/CommandCodeAI/cmd-mod-jev-nudge/raw/main/.github/workflows/demo.mp4)
+▶ [Watch the demo](https://github.com/CommandCodeAI/cmd-mod-jev-nudge/raw/main/.github/demo.mp4)
 
 Agents stop too early. They do one step, say "next I'll do X", and hand the prompt back.