Update kube requirement from 0.43 to 0.48

Updates the requirements on [kube](https://github.com/clux/kube-rs) to permit the latest version. - [Release notes](https://github.com/clux/kube-rs/releases) - [Changelog](https://github.com/clux/kube-rs/blob/master/CHANGELOG.md) - [Commits](kube-rs/kube@0.43.0...0.48.0) Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.toml

@@ -8,7 +8,7 @@ edition = "2018"
 either = "1.6"
 futures = "0.3"
 k8s-openapi = { version = "0.9.0", default-features = false, features = ["v1_18"] } # 1.19 and k8s-openapi 0.10 are not supported in kube 0.43 yet, they will be in the next released version
-kube = { version = "0.43", default-features = false, features = ["derive"] }
+kube = { version = "0.48", default-features = false, features = ["derive"] }
 kube-runtime = "0.43"
 serde = "1.0"
 serde_json = "1.0"