Bump the downloader-dependencies group in /downloader with 1 update

Updates the requirements on [reqwest](https://github.com/seanmonstar/reqwest) to permit the latest version.

Updates `reqwest` to 0.12.1
- [Release notes](https://github.com/seanmonstar/reqwest/releases)
- [Changelog](https://github.com/seanmonstar/reqwest/blob/master/CHANGELOG.md)
- [Commits](seanmonstar/reqwest@v0.11.0...v0.12.1)

---
updated-dependencies:
- dependency-name: reqwest
  dependency-type: direct:production
  dependency-group: downloader-dependencies
...

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

downloader/Cargo.toml

@@ -13,6 +13,6 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-reqwest = "0.11"
+reqwest = "0.12"
 tokio = { version = "1.24", features = ["macros", "rt-multi-thread"] }
 futures = "0.3.4"