Bump num-traits from 0.2.14 to 0.2.15

Bumps [num-traits](https://github.com/rust-num/num-traits) from 0.2.14 to 0.2.15.
- [Release notes](https://github.com/rust-num/num-traits/releases)
- [Changelog](https://github.com/rust-num/num-traits/blob/master/RELEASES.md)
- [Commits](rust-num/num-traits@num-traits-0.2.14...num-traits-0.2.15)

---
updated-dependencies:
- dependency-name: num-traits
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -17,7 +17,7 @@ ata = ["spl-associated-token-account"]
 [dependencies]
 anchor-lang = ">=0.22, <=0.24"
 anchor-spl = ">=0.22, <=0.24"
-num-traits = "^0.2.14"
+num-traits = "^0.2.15"
 spl-associated-token-account = { version = "^1.0.3", features = [
     "no-entrypoint"
 ], optional = true }