Update pbjson-types requirement from 0.6 to 0.8

---
updated-dependencies:
- dependency-name: pbjson-types
  dependency-version: 0.8.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

datafusion/substrait/Cargo.toml

@@ -38,7 +38,7 @@ chrono = { workspace = true }
 datafusion = { workspace = true, default-features = true }
 itertools = { workspace = true }
 object_store = { workspace = true }
-pbjson-types = "0.6"
+pbjson-types = "0.8"
 prost = "0.12"
 substrait = { version = "0.36.0", features = ["serde"] }
 url = { workspace = true }