chore: deny openssl (n0-computer#2372)

## Description

Update cargo-deny to avoid openssl neaking in.

## Breaking Changes

<!-- Optional, if there are any breaking changes document them,
including how to migrate older code. -->

## Notes & open questions

<!-- Any notes, remarks or open questions you have to make about the PR.
-->

## Change checklist

- [x] Self-review.
- ~~[ ] Documentation updates if relevant.~~
- ~~[ ] Tests if relevant.~~
- ~~[ ] All breaking changes documented.~~

deny.toml

@@ -1,5 +1,9 @@
 [bans]
 multiple-versions = "allow"
+deny = [
+     "openssl",
+     "native-tls",
+]
 
 [licenses]
 allow = [