Rollup merge of #144803 - tshepang:rdg-sync, r=jieyouxu

rustc-dev-guide subtree update

Subtree update of `rustc-dev-guide` to rust-lang/rustc-dev-guide@9287205.

Created using https://github.com/rust-lang/josh-sync.

r? `@ghost`

Author: samueltardieu

src/doc/rustc-dev-guide/.github/workflows/rustc-pull.yml

@@ -11,10 +11,11 @@ jobs:
     if: github.repository == 'rust-lang/rustc-dev-guide'
     uses: rust-lang/josh-sync/.github/workflows/rustc-pull.yml@main
     with:
+      github-app-id: ${{ vars.APP_CLIENT_ID }}
       zulip-stream-id: 196385
       zulip-bot-email:  "[email protected]"
       pr-base-branch: master
       branch-name: rustc-pull
     secrets:
       zulip-api-token: ${{ secrets.ZULIP_API_TOKEN }}
-      token: ${{ secrets.GITHUB_TOKEN }}
+      github-app-secret: ${{ secrets.APP_PRIVATE_KEY }}

src/doc/rustc-dev-guide/rust-version

@@ -1 +1 @@
-2b5e239c6b86cde974b0ef0f8e23754fb08ff3c5
+32e7a4b92b109c24e9822c862a7c74436b50e564

src/doc/rustc-dev-guide/src/SUMMARY.md

@@ -176,6 +176,7 @@
     - [Next-gen trait solving](./solve/trait-solving.md)
         - [Invariants of the type system](./solve/invariants.md)
         - [The solver](./solve/the-solver.md)
+        - [Candidate preference](./solve/candidate-preference.md)
         - [Canonicalization](./solve/canonicalization.md)
         - [Coinduction](./solve/coinduction.md)
         - [Caching](./solve/caching.md)