Bump actix-rt from 2.13.0 to 2.15.0 in the cargo group

Bumps the cargo group with 1 update: [actix-rt](https://github.com/actix/actix-net).


Updates `actix-rt` from 2.13.0 to 2.15.0
- [Release notes](https://github.com/actix/actix-net/releases)
- [Commits](https://github.com/actix/actix-net/compare/rt-v2.13.0...rt-v2.15.0)

---
updated-dependencies:
- dependency-name: actix-rt
  dependency-version: 2.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: cargo
...

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

Cargo.lock

@@ -85,9 +85,9 @@ dependencies = [
 
 [[package]]
 name = "actix-rt"
-version = "2.13.0"
+version = "2.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a16bf2f19c2ad84842bdfe6f3665620e93197d5c607889bfa3aaac45e762fd1"
+checksum = "e5f794807f82bbd36430c12cd600c73bbab0f52fdde4f0ed49978df113f4807f"
 dependencies = [
  "actix-macros",
  "futures-core",