[CI] Update release actions rust version

[L-jasmine]

No description provided.

[juntao]

Hello, I am a code review bot on flows.network. Here are my reviews of code commits in this PR.

---

Commit cd57065ed7d3e5115db0b0258a825bdb587e4290

Key Changes:

1. Update the Rust version from 1.75 to 1.78 in two workflows: release-wasmedge-macro.yml and release-wasmedge-types.yml.
2. Uses dtolnay/rust-toolchain@stable action to install the specified Rust version.

Findings:

1. Important: The update changes the Rust version used in the workflows, ensuring compatibility with the desired version.
2. The patch seems to be straightforward and focused on updating the Rust version for the workflows.
3. It's positive that the update has been applied consistently in both release-wasmedge-macro.yml and release-wasmedge-types.yml.
4. No additional changes or improvements were made beyond updating the Rust version.

Potential Problems:

1. Ensure that the new Rust version 1.78 is compatible with all dependencies and tooling used in your project.
2. Check that the dtolnay/rust-toolchain@stable action behaves as expected and installs the correct version effectively.
3. It's recommended to test the updated workflows to confirm that the changes have not introduced any new issues or unexpected behavior.

Overall, the patch primarily focuses on updating the Rust version, which is a critical aspect in maintaining the project. Consider testing the new Rust version thoroughly to avoid any compatibility issues.