correct help50.vsix version number

Author: rongxin-liu

Dockerfile

@@ -102,7 +102,7 @@ RUN npm install --global @vscode/vsce yarn && \
     cd help50.vsix && \
     npm install && \
     vsce package && \
-    mv help50-1.0.0.vsix /opt/cs50/extensions && \
+    mv help50-0.0.1.vsix /opt/cs50/extensions && \
     cd /tmp && \
     rm --force --recursive help50.vsix && \
     npm uninstall --global vsce yarn