style: add trailing newline to MARKDOWN_TEMPLATE

The template string in `mise-tasks/gen/ref-pages.py` was missing a
trailing newline, causing the generated output to run into subsequent
content. Adding `\n` ensures proper formatting in the rendered markdown.

Author: liblaf

mise-tasks/gen/ref-pages.py

@@ -18,7 +18,7 @@
 
 import tomlkit
 
-MARKDOWN_TEMPLATE: str = "::: {module_path}"
+MARKDOWN_TEMPLATE: str = "::: {module_path}\n"
 MODULE_SYMBOL: str = '<code class="doc-symbol doc-symbol-toc doc-symbol-module"></code>'