Merge pull request 'chore(deps): update actions/checkout action to v4' (#2) from renovate/actions-checkout-4.x into main

Reviewed-on: https://codeberg.org/subDesTagesMitExtraKaese/pihole-to-influxdb/pulls/2

.github/workflows/docker.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v2