build(deps): bump the production-dependencies group with 4 updates

Bumps the production-dependencies group with 4 updates: [tokio](https://github.com/tokio-rs/tokio), [serde](https://github.com/serde-rs/serde), [indexmap](https://github.com/indexmap-rs/indexmap) and [syn](https://github.com/dtolnay/syn).


Updates `tokio` from 1.39.2 to 1.39.3
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.39.2...tokio-1.39.3)

Updates `serde` from 1.0.207 to 1.0.208
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](serde-rs/serde@v1.0.207...v1.0.208)

Updates `indexmap` from 2.3.0 to 2.4.0
- [Changelog](https://github.com/indexmap-rs/indexmap/blob/master/RELEASES.md)
- [Commits](indexmap-rs/indexmap@2.3.0...2.4.0)

Updates `syn` from 2.0.74 to 2.0.75
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@2.0.74...2.0.75)

---
updated-dependencies:
- dependency-name: tokio
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: production-dependencies
- dependency-name: serde
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: production-dependencies
- dependency-name: indexmap
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production-dependencies
- dependency-name: syn
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: production-dependencies
...

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

ghactions-core/Cargo.toml

@@ -32,7 +32,7 @@ glob = { version = "^0.3", optional = true }
 log = { version = "0.4", optional = true }
 env_logger = { version = "0.11", optional = true }
 # IndexMap
-indexmap = { version = "^2.2", features = ["serde"] }
+indexmap = { version = "^2.4", features = ["serde"] }
 # GitHub API
 octocrab = { version = "^0.39", optional = true }
 http = { version = "^1", optional = true }