Fix README link

Mergeback v2.20.3 refs/heads/releases/v2 into main

Previously, we made an API call to look up the CLI version to release
mapping when the default CLI version was requested on Dotcom and that
CLI wasn't in the toolcache.
Now we compute the tag name directly for semver bundles.

…ion-simplifications

Skip an API call when downloading a CodeQL version with a semver bundle

Add a deprecation warning for CodeQL CLIs < 2.9.4

The default version feature flags will now always point to a CLI version
with a semantically versioned bundle, so we can find the GitHub
Release directly from the CLI version.

Previously, this was useful for discriminating between different
`CodeQLDefaultVersion` instances. However now all instances return a
tag name.

…ases-fallback

Simplify CodeQL setup now that the last two releases have semver bundles

The amount of RAM given to the CodeQL evaluator is the machine's total
memory size, minus a reserved amount. Currently, the reserved amount is
fixed at 1 GB (or 1.5 GB on Windows). When the scaling_reserved_ram
feature flag is enabled, we also add 2% of the total memory size to the
reserved amount. This allows for the fact that the kernel will consume
more RAM (e.g. for page tables) on machines with more physical RAM.

* Bump tough-cookie and @azure/ms-rest-js

Bumps [tough-cookie](https://github.com/salesforce/tough-cookie) and [@azure/ms-rest-js](https://github.com/Azure/ms-rest-js). These dependencies needed to be updated together.

Updates `tough-cookie` from 4.0.0 to 4.1.3
- [Release notes](https://github.com/salesforce/tough-cookie/releases)
- [Changelog](https://github.com/salesforce/tough-cookie/blob/master/CHANGELOG.md)
- [Commits](salesforce/tough-cookie@v4.0.0...v4.1.3)

Updates `@azure/ms-rest-js` from 2.6.2 to 2.7.0
- [Changelog](https://github.com/Azure/ms-rest-js/blob/master/Changelog.md)
- [Commits](https://github.com/Azure/ms-rest-js/commits)

---
updated-dependencies:
- dependency-name: tough-cookie
  dependency-type: indirect
- dependency-name: "@azure/ms-rest-js"
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update checked-in dependencies

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Respect `scaling_reserved_ram` feature flag