Suggest the latest release in the code example.

The check is from the time when the MSRV was included in the build matrix.

Bare URLs are not automatically turned into clickable links.

* xml5ever: remove unused rust-test dev-dependency

This isn't actually used by any code in the crate.

* rcdom: port tests/xml-tree-builder to a custom runner

This doesn't distribute the individual tests across the build-in
harness, hurting parallelism and process isolation. On the other
hand it's a minimal change to port off the rustc-test dependency
which hasn't been actively maintained and currently doesn't compile.

* rcdom: Port remaining tests to a custom runner

Move the custom test runner into its own `util::runner` module
and use it instead of rustc_test for the other test files.
This allows `cargo test` to complete under rust 1.77.1.

* github actions: Remove rustc-test/capture feature check

This is no longer available since the depdendency has been
removed.

Specify the current version of the benchmarking framework to address
cargo audit warnings about the dependencies of earlier releases.

Note that this requires rust 1.74.1 or later to run `cargo bench`
but MSRV (1.60.0) is only gated against the library target itself
and not dev-dependencies, so this is no change in the requirements
on downstream users.

* Adding comments for arena

* Adding comments for noop-tokenize

* Adding comments for noop-tree-builder

* Adding comments for print-tree-actions

* Add comments for tokenize

* Removing redundant comments

---------

Co-authored-by: Or Gany <gangana3@gmail.com>
Co-authored-by: Martin Robinson <mrobinson@igalia.com>

This change makes it so that CI does not pass unless all jobs defined in
the workflow file pass. This is necessary in order to prevent landing
changes that break CI jobs. `success()` and `failure()` which were used
before do not take into account dependent jobs.

This also fixes the "lint" job which was failing, by formatting the code.