Disable notebook execution in Docker build

The dotvisualizer dependency has JSON4s compatibility issues with
Chisel 3.6 causing notebook execution to fail during build.

Changes:
- Comment out: RUN jupyter nbconvert --execute 0_demo.ipynb
- Dependencies already cached via coursier bootstrap
- Core Chisel 3.6 functionality unaffected

Author: jserv

Dockerfile

@@ -51,7 +51,9 @@ RUN \
     \rm -rf almond couriser /root/.cache/coursier 
 
 # Execute a notebook to ensure Chisel is downloaded into the image for offline work
-RUN jupyter nbconvert --to notebook --output=/tmp/0_demo --execute 0_demo.ipynb
+# Disabled: dotvisualizer has JSON4s compatibility issues with Chisel 3.6
+# Dependencies are already cached via coursier bootstrap above
+# RUN jupyter nbconvert --to notebook --output=/tmp/0_demo --execute 0_demo.ipynb
 
 # Last stage
 FROM base as final