Update darling requirement in the rust-dependencies group (#147)

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

Author: dependabot[bot]

crates/grafana-plugin-sdk-macros/Cargo.toml

@@ -11,7 +11,7 @@ description = "Convenience macros for the Grafana backend plugin SDK."
 proc-macro = true
 
 [dependencies]
-darling = "0.21.3"
+darling = "0.22.0"
 proc-macro2 = "1.0.60"
 quote = "1.0.28"
 syn = { version = "2.0.18", features = ["full"] }