fix compilot instruction

Author: brunoborges

.github/copilot-instructions.md

@@ -28,7 +28,7 @@ The following are **generated by `html-generators/generate.java`** and must not
 - `site/language/*.html`, `site/collections/*.html`, etc. — detail pages
 - `site/data/snippets.json` — aggregated search index
 
-Run `java -jar html-generators/generate.jar` to rebuild all generated files from the JSON sources.
+Run `jbang html-generators/generate.java` to rebuild all generated files from the JSON sources.
 
 ### Manually Maintained Files
 
@@ -118,11 +118,11 @@ Each `content/category/slug.json` file has this structure:
 
 1. Create `content/category/new-slug.json` with all required fields
 2. Update `prev`/`next` in the adjacent patterns' JSON files
-3. Run `java -jar html-generators/generate.jar`
+3. Run `jbang html-generators/generate.java`
 
 ## Local Development
 
 ```bash
-java -jar html-generators/generate.jar  # Build HTML pages + snippets.json
+jbang html-generators/generate.java  # Build HTML pages + snippets.json
 jwebserver -d site -p 8090              # Serve locally
 ```