server : update auto gen files comments [no ci]

This commit updates the 'auto generated files' comments in server.cpp
and removes `deps.sh` from the comment.

The motivation for this change is that `deps.sh` was removed in
Commit 91c36c2 ("server : (web ui)
Various improvements, now use vite as bundler (ggml-org#10599)").

Author: danbev

examples/server/server.cpp

@@ -14,7 +14,9 @@
 // mime type for sending response
 #define MIMETYPE_JSON "application/json; charset=utf-8"
 
-// auto generated files (update with ./deps.sh)
+// auto generated files update by:
+// $ npm run build --prefix examples/server/webui (updates examples/server/public/index.html.gz)
+// $ cmake --build build --target llama-server    (generates build/examples/server/index.html.gz.hpp)
 #include "index.html.gz.hpp"
 #include "loading.html.hpp"