build(deps): Bump tempfile in /functional-tests in the rust group

Bumps the rust group in /functional-tests with 1 update: [tempfile](https://github.com/Stebalien/tempfile).


Updates `tempfile` from 3.14.0 to 3.15.0
- [Changelog](https://github.com/Stebalien/tempfile/blob/master/CHANGELOG.md)
- [Commits](Stebalien/tempfile@v3.14.0...v3.15.0)

---
updated-dependencies:
- dependency-name: tempfile
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: rust
...

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

Author: dependabot[bot]

functional-tests/Cargo.lock

@@ -5,7 +5,7 @@ edition = "2021"
 authors = ["Adrian Utrilla <adrianutrilla@gmail.com>"]
 
 [dependencies]
-tempfile = "3.12.0"
+tempfile = "3.15.0"
 serde = "1.0"
 serde_json = "1.0.134"
 serde_yaml = "0.9.34"