test against newer k8s, scaffolding release

Signed-off-by: Bob Callaway <bcallaway@google.com>

Author: bobcallaway

.github/workflows/e2e-tests.yml

@@ -86,7 +86,7 @@ jobs:
       VAULT_TOKEN: "root"
       VAULT_ADDR: "http://localhost:8200"
       COSIGN_YES: "true"
-      SCAFFOLDING_RELEASE_VERSION: "v0.7.11"
+      SCAFFOLDING_RELEASE_VERSION: "v0.7.18"
     steps:
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
@@ -118,7 +118,7 @@ jobs:
     runs-on: ubuntu-latest
 
     env:
-      SCAFFOLDING_RELEASE_VERSION: "v0.7.11"
+      SCAFFOLDING_RELEASE_VERSION: "v0.7.18"
 
     steps:
     - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

.github/workflows/kind-verify-attestation.yaml

@@ -33,7 +33,10 @@ jobs:
     strategy:
       matrix:
         k8s-version:
-        - v1.27.x
+        - v1.29.x
+        - v1.30.x
+        - v1.31.x
+        - v1.32.x
         tuf-root:
         - remote
         - air-gap
@@ -43,7 +46,7 @@ jobs:
 
     env:
       KO_DOCKER_REPO: "registry.local:5000/policy-controller"
-      SCAFFOLDING_RELEASE_VERSION: "v0.7.11"
+      SCAFFOLDING_RELEASE_VERSION: "v0.7.18"
       GO111MODULE: on
       GOFLAGS: -ldflags=-s -ldflags=-w
       KOCACHE: ~/ko