Rollup merge of rust-lang#132881 - aDotInTheVoid:docs-for-docs, r=jieyouxu

triagebot: Autolabel rustdoc book

Inspired by rust-lang#132876 not getting labeled as https://github.com/rust-lang/rust/labels/T-rustdoc

r? `@GuillaumeGomez`

Author: matthiaskrgr

triagebot.toml

@@ -212,6 +212,10 @@ trigger_files = [
     "src/tools/rustdoc-gui",
     "src/tools/rustdoc-js",
     "src/tools/rustdoc-themes",
+
+    # Docs
+    "src/doc/rustdoc.md",
+    "src/doc/rustdoc/",
 ]
 exclude_labels = [
     "T-*",