build(deps): update utxorpc-spec requirement from 0.6.0 to 0.7.0

Updates the requirements on [utxorpc-spec](https://github.com/utxorpc/spec) to permit the latest version.
- [Commits](utxorpc/spec@v0.6.0...v0.7.0)

---
updated-dependencies:
- dependency-name: utxorpc-spec
  dependency-type: direct:production
...

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

pallas-utxorpc/Cargo.toml

@@ -16,7 +16,7 @@ pallas-primitives = { version = "=0.28.0", path = "../pallas-primitives" }
 pallas-codec = { version = "=0.28.0", path = "../pallas-codec" }
 pallas-crypto = { version = "=0.28.0", path = "../pallas-crypto" }
 
-utxorpc-spec = { version = "0.6.0" }
+utxorpc-spec = { version = "0.7.0" }
 
 [dev-dependencies]
 hex = "0.4.3"