build(deps): bump the ci group across 1 directory with 3 updates

Bumps the ci group with 3 updates in the / directory: [actions/checkout](https://github.com/actions/checkout), [actions/setup-go](https://github.com/actions/setup-go) and [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer).


Updates `actions/checkout` from 4 to 5
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

Updates `actions/setup-go` from 5 to 6
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](actions/setup-go@v5...v6)

Updates `sigstore/cosign-installer` from 3.8.1 to 3.9.2
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@v3.8.1...v3.9.2)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: ci
- dependency-name: actions/setup-go
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: ci
- dependency-name: sigstore/cosign-installer
  dependency-version: 3.9.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ci
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -19,9 +19,9 @@ jobs:
       labels: ubuntu-latest-16-cores
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Setup Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: 1.24.x
           cache-dependency-path: |

.github/workflows/e2e.yaml

@@ -38,7 +38,7 @@ jobs:
           - knative
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Setup Kubernetes
         uses: helm/[email protected]
         if: matrix.provider != 'skipper'

.github/workflows/helm.yaml

@@ -12,7 +12,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Publish Helm charts
         uses: stefanprodan/[email protected]
         with:

.github/workflows/push-ld.yml

@@ -16,8 +16,8 @@ jobs:
       id-token: write
       packages: write
     steps:
-      - uses: actions/checkout@v4
-      - uses: sigstore/cosign-installer@v3.8.1
+      - uses: actions/checkout@v5
+      - uses: sigstore/cosign-installer@v3.9.2
       - name: Prepare
         id: prep
         run: |

.github/workflows/release.yml

@@ -27,13 +27,13 @@ jobs:
       id-token: write # needed for keyless signing
       packages: write # needed for ghcr access
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Setup Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: 1.24.x
       - uses: fluxcd/flux2/action@main
-      - uses: sigstore/cosign-installer@v3.8.1
+      - uses: sigstore/cosign-installer@v3.9.2
       - name: Prepare
         id: prep
         run: |

.github/workflows/scan.yml

@@ -17,7 +17,7 @@ jobs:
     permissions:
       security-events: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Run FOSSA scan and upload build data
         uses: fossa-contrib/fossa-action@v3
         with:
@@ -30,9 +30,9 @@ jobs:
       security-events: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Setup Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: 1.24.x
       - name: Initialize CodeQL