Update Dockerfile to rust 1.84.0

### Checklist

* [x] I have read the [Contributor Guide](../../CONTRIBUTING.md)
* [x] I have read and agree to the [Code of Conduct](../../CODE_OF_CONDUCT.md)
* [x] I have added a description of my changes and why I'd like them included in the section below

### Description of Changes

There is currently no way to override this rust version it seems as it doesn't seem to respect RUST_TOOLCHAIN env variable either... 

Problem is that I'm using already package resolver v3 and that is not possible unless it's running 1.84 or higher.

Nightly would be an option as well of course

### Related Issues

N/A

Dockerfile

@@ -1,4 +1,4 @@
-FROM rust:1.83.0-alpine3.20
+FROM rust:1.84.0-alpine3.20
 
 ENV deny_version="0.16.3"