build(deps): bump tower-http from 0.6.6 to 0.6.8

Bumps [tower-http](https://github.com/tower-rs/tower-http) from 0.6.6 to 0.6.8.
- [Release notes](https://github.com/tower-rs/tower-http/releases)
- [Commits](tower-rs/tower-http@tower-http-0.6.6...tower-http-0.6.8)

---
updated-dependencies:
- dependency-name: tower-http
  dependency-version: 0.6.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Cargo.lock

@@ -96,7 +96,7 @@ tokio-retry = "0.3.0"
 
 tonic = { version = "0.12.3", features = ["tls-roots", "gzip"] }
 tonic-build = { version = "0.12.3", features = ["prost"] }
-tower-http = { version = "0.6.6", features = ["cors"] }
+tower-http = { version = "0.6.8", features = ["cors"] }
 wasmparser = "0.118.1"
 wasmtime = { version = "33.0.2", features = ["async"] }
 substreams = "=0.6.0"