Update salvo requirement from 0.63 to 0.64 (#25)

Updates the requirements on [salvo](https://github.com/salvo-rs/salvo) to permit the latest version.
- [Release notes](https://github.com/salvo-rs/salvo/releases)
- [Commits](salvo-rs/salvo@v0.63.0...v0.63.1)

---
updated-dependencies:
- dependency-name: salvo
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -43,7 +43,7 @@ paste = "1"
 percent-encoding = "2"
 path-slash = "0.2"
 regex = "1"
-salvo = { version = "0.63", default-features = true }    
+salvo = { version = "0.64", default-features = true }    
 serde = { version = "1" }
 serde_json = { version = "1" }    
 smallvec = "1"