Update dependency cdk8s to ~=2.70.4

Author: renovate[bot]

Pipfile

@@ -8,7 +8,7 @@ python_version = "3"
 
 [packages]
 constructs = "~=10.4.2"
-cdk8s = "~=2.69.54"
+cdk8s = "~=2.70.4"
 cdk8s-plus-28 = "~=2.5.6"
 pyyaml = "~=6.0.2"
 pydantic = "~=2.11.3"