Bump actions/checkout from 4 to 5

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] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -18,7 +18,7 @@ jobs:
         runs-on: ubuntu-22.04
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
             - uses: actions/setup-node@v4
               with:
                   node-version: 20.9.0
@@ -31,7 +31,7 @@ jobs:
         runs-on: ubuntu-22.04
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
             - uses: actions/setup-node@v4
               with:
                   node-version: 20.9.0
@@ -44,7 +44,7 @@ jobs:
         runs-on: ubuntu-22.04
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
             - uses: actions/setup-node@v4
               with:
                   node-version: 20.9.0
@@ -57,7 +57,7 @@ jobs:
         runs-on: ubuntu-22.04
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
             - uses: actions/setup-node@v4
               with:
                   node-version: 20.9.0

.github/workflows/firebase-hosting-merge.yml

@@ -7,7 +7,7 @@ jobs:
     build_and_deploy:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
             - uses: actions/setup-node@v4
               with:
                   node-version: 20.9.0

.github/workflows/firebase-hosting-pull-request.yml

@@ -5,7 +5,7 @@ jobs:
         if: '${{ github.event.pull_request.head.repo.full_name == github.repository }}'
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v6
             - uses: actions/setup-node@v4
               with:
                   node-version: 20.9.0