Update contributing doc troubleshooting

CONTRIBUTING.md

@@ -35,11 +35,12 @@ Run `just -l` for a list of all available commands.
 
 #### Troubleshooting
 
-If you run into dependency-related issues with the `justfile` commands, you may need to do one or any of the following:
+If you run into dependency-related issues with the `justfile` build commands, you may need to do one or any of the following:
 
-- Remove `node_modules`
-- Upgrade `deno`
-- Reload all cached deno dependencies (e.g., `find . -type f \( -name "*.ts" \) -exec deno cache --reload {} +`)
+- Remove `node_modules` (`just clean-all`)
+- Reload all cached deno dependencies (`just reload-all`)
+
+Note that you'll need several tools installed to run the examples. This includes `bun` and `deno`.
 
 ### Overview