build(deps): bump actions/checkout from 4 to 5 in /.github/workflows

Bumps [actions/checkout](https://github.com/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)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/deploy-dev-gcp.yaml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Setup node
         uses: actions/setup-node@v4
         with:

.github/workflows/deploy-prod-gcp.yaml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Setup node
         uses: actions/setup-node@v4
         with:

.github/workflows/poao-frontend-container-dev.yaml

@@ -19,7 +19,7 @@ jobs:
     permissions:
       id-token: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: deploy gcp dev
         uses: nais/deploy/actions/deploy@v2
         env:

.github/workflows/poao-frontend-container-prod.yaml

@@ -19,7 +19,7 @@ jobs:
     permissions:
       id-token: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: deploy gcp prod
         uses: nais/deploy/actions/deploy@v2
         env:

.github/workflows/update-github-pages.yaml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Setup node
         uses: actions/setup-node@v4
         with: