ci: update versions in workflows (#16)

Author: reugn

.github/workflows/build.yml

@@ -13,15 +13,15 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go-version: [1.18.x, 1.20.x]
+        go-version: [1.18.x, 1.21.x]
     steps:
     - name: Setup Go
       uses: actions/setup-go@v4
       with:
         go-version: ${{ matrix.go-version }}
 
     - name: Checkout code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Run coverage
       run: go test . -coverprofile=coverage.out -covermode=atomic

.github/workflows/golangci-lint.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3