Update actions/checkout action to v4

.github/workflows/docker.yml

@@ -17,7 +17,7 @@ jobs:
         uses: docker/setup-buildx-action@v1
       -
         name: Check out the repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       #-
       #  name: Log in to DockerHub
       #  uses: docker/login-action@v1

.github/workflows/go.yml

@@ -16,7 +16,7 @@ jobs:
         id: go
 
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v1
+        uses: actions/checkout@v4
 
       - name: Build
         run: go build -v .