chore(deps): update actions/checkout action to v4 (#157)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/docker.yml

@@ -9,7 +9,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout repository
-              uses: actions/checkout@v3
+              uses: actions/checkout@v4
             - uses: actions/setup-node@v3
               with:
                   node-version: 16
@@ -25,7 +25,7 @@ jobs:
             packages: write
         steps:
             - name: Checkout repository
-              uses: actions/checkout@v3
+              uses: actions/checkout@v4
             - name: Set up QEMU
               uses: docker/setup-qemu-action@v2
               with:
@@ -59,7 +59,7 @@ jobs:
             name: production (projects-bot)
         steps:
             - name: Checkout repository
-              uses: actions/checkout@v3
+              uses: actions/checkout@v4
               with:
                   repository: csesoc/deployment
                   token: ${{ secrets.GH_TOKEN }}