Update build pipeline to use Go 1.21 and modern GitHub Actions

Co-authored-by: ziflex <[email protected]>

Author: Copilot

.github/workflows/build.yml

@@ -11,20 +11,20 @@ jobs:
     name: Build
     runs-on: ubuntu-latest
     steps:
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v4
+
       - name: Set up Go 1.x
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v5
         with:
-          go-version: ^1.17
+          go-version: ^1.21
         id: go
 
       - name: Set up linter
-        run: go get -u github.com/mgechev/revive
-
-      - name: Check out code into the Go module directory
-        uses: actions/checkout@v2
+        run: go install github.com/mgechev/revive@latest
 
       - name: Get dependencies
-        run: go get -v -t -d ./...
+        run: go mod download
 
       - name: Lint
         run: revive -config revive.toml -formatter stylish -exclude ./vendor/... ./...