Update actions/checkout action to v4 (#113)

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

.github/workflows/docker-publish-on-comment.yml

@@ -35,7 +35,7 @@ jobs:
         uses: xt0rted/pull-request-comment-branch@v2
         id: comment-branch
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ steps.comment-branch.outputs.head_ref }}         
       - name: Set latest commit status as pending

.github/workflows/docker-publish.yml

@@ -35,7 +35,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       # Install the cosign tool except on PR
       # https://github.com/sigstore/cosign-installer

.github/workflows/lint.yml

@@ -12,7 +12,7 @@ jobs:
   markdown:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: ⬇️ lint markdown files # Lints all markdown (.md) files
         uses: avto-dev/markdown-lint@v1
         with:
@@ -21,7 +21,7 @@ jobs:
   renovate:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: 🧼 lint renovate config # Validates changes to renovate.json config file
         uses: suzuki-shunsuke/[email protected]
         with:
@@ -33,7 +33,7 @@ jobs:
       - uses: actions/setup-go@v4
         with:
           go-version: 1.19
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
         with: