Update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -42,7 +42,7 @@ jobs:
           - 5432:5432
     steps:
       - run: git config --global core.autocrlf input
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: astral-sh/setup-uv@v3

.github/workflows/deploy.yml

@@ -16,6 +16,6 @@ jobs:
     if: ${{ github.event.workflow_run.conclusion == 'success' }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: superfly/flyctl-actions/setup-flyctl@master
       - run: flyctl deploy --remote-only

.github/workflows/semgrep.yml

@@ -12,7 +12,7 @@ jobs:
     container:
       image: returntocorp/semgrep
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: semgrep ci
       env:
           SEMGREP_APP_TOKEN: ${{ secrets.SEMGREP_APP_TOKEN }}