chore(ci): bump github actions and use go.mod Go version (#2880)

- actions/checkout from v4 to v5
- actions/setup-go uses go-version from go.mod file
- DavidAnson/markdownlint-cli2-action from v19 to v20

.github/workflows/ci.yml

@@ -37,7 +37,7 @@ jobs:
     env:
       DOCKER_BUILDKIT: "1"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - uses: reviewdog/action-misspell@v1
         with:
@@ -73,10 +73,10 @@ jobs:
       contents: read
       security-events: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-go@v5
         with:
-          go-version: "^1.23"
+          go-version-file: go.mod
       - uses: github/codeql-action/init@v3
         with:
           languages: go
@@ -98,7 +98,7 @@ jobs:
       packages: write
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       # extract metadata (tags, labels) for Docker
       # https://github.com/docker/metadata-action