Fix coverage calculation: exclude examples from coverage reporting

Author: vnykmshr

.github/workflows/ci.yml

@@ -41,7 +41,7 @@ jobs:
       run: go build ./...
 
     - name: Test
-      run: go test -v -race -coverprofile=coverage.out ./...
+      run: go test -v -race -coverprofile=coverage.out ./pkg/... ./internal/...
 
     - name: Build examples
       run: go build ./examples/...