fix(deps): update rust crate tokio to 1.38.2 [security]

| datasource | package | from   | to     |
| ---------- | ------- | ------ | ------ |
| crate      | tokio   | 1.28.2 | 1.38.2 |


Signed-off-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>

Author: renovate-sh-app[bot]

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

@@ -21,7 +21,7 @@ grafana-plugin-sdk = { path = "../grafana-plugin-sdk" }
 http = "1.0.0"
 serde = { version = "1.0.164", features = ["derive"] }
 thiserror = "2.0.11"
-tokio = { version = "1.28.2", features = ["rt-multi-thread"] }
+tokio = { version = "1.38.2", features = ["rt-multi-thread"] }
 trybuild = "1.0.80"
 
 [package.metadata.docs.rs]

crates/grafana-plugin-sdk/Cargo.toml

@@ -25,7 +25,7 @@ serde_json = { version = "1.0.96", features = ["float_roundtrip", "raw_value"] }
 serde_with = "3.0.0"
 thiserror = "2.0.11"
 time = { version = "0.3.22", features = ["formatting", "macros"] }
-tokio = { version = "1.28.2", features = ["rt-multi-thread"] }
+tokio = { version = "1.38.2", features = ["rt-multi-thread"] }
 tokio-stream = { version = "0.1.14", features = ["net"] }
 tonic = "0.14.2"
 tonic-health = "0.14.2"
@@ -47,7 +47,7 @@ futures = "0.3.28"
 paste = "1.0.12"
 pretty_assertions = "1.3.0"
 prometheus = { version = "0.14.0", default-features = false }
-tokio = { version = "1.28.2", features = ["rt-multi-thread"] }
+tokio = { version = "1.38.2", features = ["rt-multi-thread"] }
 tokio-stream = "0.1.14"
 
 [build-dependencies]