Correct version of doc_overindented_list_items (#14152)

Fix the version of `doc_overindented_list_items`. It actually will be in
1.86.0, not 1.80.0.
(rust-lang/rust#136209 has a milestone of
1.86.0)

changelog: none

Author: llogiq

clippy_lints/src/doc/mod.rs

@@ -454,7 +454,7 @@ declare_clippy_lint! {
     /// ///   and this line is overindented.
     /// # fn foo() {}
     /// ```
-    #[clippy::version = "1.80.0"]
+    #[clippy::version = "1.86.0"]
     pub DOC_OVERINDENTED_LIST_ITEMS,
     style,
     "ensure list items are not overindented"