Update module github.com/stackitcloud/stackit-sdk-go/core to v0.26.0 (#155)

Co-authored-by: ske-renovate-ce[bot] <163154779+ske-renovate-ce[bot]@users.noreply.github.com>

Author: ske-renovate-ce[bot]

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/onsi/ginkgo/v2 v2.28.1
 	github.com/onsi/gomega v1.39.1
 	github.com/spf13/pflag v1.0.10
-	github.com/stackitcloud/stackit-sdk-go/core v0.25.0
+	github.com/stackitcloud/stackit-sdk-go/core v0.26.0
 	github.com/stackitcloud/stackit-sdk-go/services/iaas v1.10.1
 	k8s.io/api v0.35.4
 	k8s.io/apimachinery v0.35.4

go.sum

@@ -107,8 +107,8 @@ github.com/spf13/cobra v1.10.0/go.mod h1:9dhySC7dnTtEiqzmqfkLj47BslqLCUPMXjG2lj/
 github.com/spf13/pflag v1.0.8/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/spf13/pflag v1.0.10 h1:4EBh2KAYBwaONj6b2Ye1GiHfwjqyROoF4RwYO+vPwFk=
 github.com/spf13/pflag v1.0.10/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-github.com/stackitcloud/stackit-sdk-go/core v0.25.0 h1:ra3VEk684MNoq741g+xbZrKjZzhyztq5liUAwwew4DY=
-github.com/stackitcloud/stackit-sdk-go/core v0.25.0/go.mod h1:WU1hhxnjXw2EV7CYa1nlEvNpMiRY6CvmIOaHuL3pOaA=
+github.com/stackitcloud/stackit-sdk-go/core v0.26.0 h1:jQEb9gkehfp6VCP6TcYk7BI10cz4l0KM2L6hqYBH2QA=
+github.com/stackitcloud/stackit-sdk-go/core v0.26.0/go.mod h1:WU1hhxnjXw2EV7CYa1nlEvNpMiRY6CvmIOaHuL3pOaA=
 github.com/stackitcloud/stackit-sdk-go/services/iaas v1.10.1 h1:cnuhSWcd2MxG/LWkJgxTZCbtLCBLNSB31/iGfCj7rUw=
 github.com/stackitcloud/stackit-sdk-go/services/iaas v1.10.1/go.mod h1:Qa7486Y17g07N/9HbAVEVPcPZ+e1l3y7F9I7j5nKewY=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=