Rollup merge of rust-lang#122383 - apiraino:enable-pr-tracking, r=jackh726

Enable PR tracking review assignment for rust-lang/rust

This flag enables tracking pull requests review assignment to Rust contributors.

The URL pointing to the documentation will become real once rust-lang/rust-forge#729 is merged

r? `@jackh726`

cc: `@Mark-Simulacrum`

Author: matthiaskrgr

triagebot.toml

@@ -854,3 +854,7 @@ project-stable-mir = [
 "/src/tools/tidy" =                                      ["bootstrap"]
 "/src/tools/x" =                                         ["bootstrap"]
 "/src/tools/rustdoc-gui-test" =                          ["bootstrap", "@onur-ozkan"]
+
+# Enable tracking of PR review assignment
+# Documentation at: https://forge.rust-lang.org/triagebot/pr-assignment-tracking.html
+[pr-tracking]