Bump actions/checkout from 2 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/clear-and-update-index.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     environment: Indexing
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-python@v4
         with:

.github/workflows/deploy-cloud-run.yaml

@@ -14,7 +14,7 @@ jobs:
       VERCEL_ORG_ID: ${{ secrets.VERCEL_ORG_ID }}
       VERCEL_PROJECT_ID: ${{ secrets.VERCEL_PROJECT_ID }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Install Vercel CLI
         run: npm install --global vercel@latest
       - name: Pull Vercel Environment Information

.github/workflows/eval.yml

@@ -19,7 +19,7 @@ jobs:
     environment: Evaluation
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Python + Poetry
         uses: "./.github/actions/poetry_setup"

.github/workflows/update-index.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     environment: Indexing
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: '3.11'