Fix depth of settings headers (#5103)

Closes https://github.com/astral-sh/uv/issues/5092.

docs/settings.md

@@ -1,5 +1,5 @@
-### Global
-##### [`index-url`](#index-url) {: #index-url }
+## Global
+#### [`index-url`](#index-url) {: #index-url }
 
 The URL of the Python package index (by default: <https://pypi.org/simple>).
 
@@ -30,7 +30,7 @@ The index provided by this setting is given lower priority than any indexes spec
 
 ---
 
-##### [`managed`](#managed) {: #managed }
+#### [`managed`](#managed) {: #managed }
 
 Whether the project is managed by `uv`. If `false`, `uv` will ignore the project when
 `uv run` is invoked.
@@ -56,11 +56,14 @@ Whether the project is managed by `uv`. If `false`, `uv` will ignore the project
 
 ---
 
-#### `pip`
+## `pip`
 
-A `[tool.uv.pip]` section.
+Settings that are specific to the `uv pip` command-line interface.
 
-##### [`no-header`](#pip_no-header) {: #pip_no-header }
+These values will be ignored when running commands outside the `uv pip` namespace (e.g.,
+`uv lock`, `uvx`).
+
+#### [`no-header`](#pip_no-header) {: #pip_no-header }
 <span id="no-header"></span>
 
 Exclude the comment header at the top of output file generated by `uv pip compile`.
@@ -86,9 +89,9 @@ Exclude the comment header at the top of output file generated by `uv pip compil
 
 ---
 
-#### `workspace`
+## `workspace`
 
-##### [`exclude`](#workspace_exclude) {: #workspace_exclude }
+#### [`exclude`](#workspace_exclude) {: #workspace_exclude }
 <span id="exclude"></span>
 
 Packages to exclude as workspace members. If a package matches both `members` and
@@ -119,7 +122,7 @@ For more information on the glob syntax, refer to the [`glob` documentation](htt
 
 ---
 
-##### [`members`](#workspace_members) {: #workspace_members }
+#### [`members`](#workspace_members) {: #workspace_members }
 <span id="members"></span>
 
 Packages to include as workspace members.