Fix enterprise category not showing slugs in generate.java

Co-authored-by: brunoborges <129743+brunoborges@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -9,6 +9,7 @@ site/errors/*.html
 site/datetime/*.html
 site/security/*.html
 site/tooling/*.html
+site/enterprise/*.html
 
 # Generated aggregate file (built from individual JSON sources by html-generators/)
 site/data/snippets.json

html-generators/generate.java

@@ -22,6 +22,7 @@
     put("concurrency", "Concurrency"); put("io", "I/O");
     put("errors", "Errors");     put("datetime", "Date/Time");
     put("security", "Security"); put("tooling", "Tooling");
+    put("enterprise", "Enterprise");
 }};
 
 static final Set<String> EXCLUDED_KEYS = Set.of("_path", "prev", "next", "related");