Use MkDocs' `not_in_nav` (#5498)

Closes #5497
Needs MkDocs 1.5 to be released.
- [x] https://github.com/mkdocs/mkdocs/milestone/15

## Summary
Uses MkDocs' `not_in_nav` config to hide spam about files in
`docs/rules/` not being in nav.

crates/ruff_dev/src/generate_docs.rs

@@ -103,7 +103,7 @@ fn process_documentation(documentation: &str, out: &mut String) {
 
                 let anchor = option.replace('.', "-");
                 out.push_str(&format!("- [`{option}`][{option}]\n"));
-                after.push_str(&format!("[{option}]: ../../settings#{anchor}\n"));
+                after.push_str(&format!("[{option}]: ../settings.md#{anchor}\n"));
 
                 continue;
             }
@@ -151,8 +151,8 @@ Something [`else`][other].
 
 [other]: http://example.com.
 
-[task-tags]: ../../settings#task-tags
-[mccabe.max-complexity]: ../../settings#mccabe-max-complexity
+[task-tags]: ../settings.md#task-tags
+[mccabe.max-complexity]: ../settings.md#mccabe-max-complexity
 "
         );
     }

crates/ruff_dev/src/generate_rules_table.rs

@@ -61,7 +61,7 @@ pub(crate) fn generate() -> String {
     table_out.push('\n');
 
     table_out.push_str(&format!(
-        "The {PREVIEW_SYMBOL} emoji indicates that a rule in [\"preview\"](../faq/#what-is-preview)."
+        "The {PREVIEW_SYMBOL} emoji indicates that a rule in [\"preview\"](faq.md#what-is-preview)."
     ));
     table_out.push('\n');
     table_out.push('\n');

docs/requirements-insiders.txt

@@ -1,4 +1,4 @@
 PyYAML==6.0
 black==23.3.0
-mkdocs==1.4.3
-git+ssh://git@github.com/astral-sh/mkdocs-material-insiders.git
+mkdocs==1.5.0
+git+ssh://git@github.com/astral-sh/mkdocs-material-insiders.git@38c0b8187325c3bab386b666daf3518ac036f2f4

docs/requirements.txt

@@ -1,4 +1,4 @@
 PyYAML==6.0
 black==23.3.0
-mkdocs==1.4.3
+mkdocs==1.5.0
 mkdocs-material==9.1.18

mkdocs.template.yml

@@ -51,6 +51,8 @@ plugins:
   - search
 extra_css:
   - stylesheets/extra.css
+not_in_nav: |
+  /rules/*
 extra:
   analytics:
     provider: fathom