update the docs

Author: RomneyDa

docs/docs/agent/how-it-works.md

@@ -32,6 +32,7 @@ Continue includes several built-in tools which provide the model access to IDE f
 - **Read currently open file** (`builtin_read_currently_open_file`): read the contents of the currently open file
 - **Create new file** (`builtin_create_new_file`): Create a new file within the project, with path and contents specified by the model
 - **Exact search** (`builtin_exact_search`): perform a `ripgrep` search within the project
+- **Glob search** (`builtin_file_glob_search`): perform a glob search on files in the project. Currently limits to 100 output and warns the Agent if limit reached.
 - **Run terminal command** (`builtin_run_terminal_command`): run a terminal command from the workspace root
 - **Search web** (`builtin_search_web`): Perform a web search to get top results
 - **View diff** (`builtin_view_diff`): View the current working git diff