Quick links fix (#2553)

* Quick links fix

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

docs/quick-links.md

@@ -2,16 +2,14 @@
 
 ```{eval-rst}
 .. toctree::
-    :hidden:
     :maxdepth: 1
 
-    404
+    references/configuration_options_reference
+    user-guide/advanced_topics/queries
+    user-guide/advanced_topics/environment_variables
+    references/api-reference/C_API
+    user-guide/installation/helics_cmake_options
+    references/apps/index
 
-```
 
-- [Configuration Option Reference](./references/configuration_options_reference.md)
-- [Queries](./user-guide/advanced_topics/queries.md)
-- [Environment Variables](./user-guide/advanced_topics/environment_variables.md)
-- [C function Reference](https://docs.helics.org/en/latest/doxygen/C_api_index.html)
-- [CMake Variables](./user-guide/installation/helics_cmake_options.md)
-- [HELICS Apps](../references/apps/index.md)
+```