Add missing import to example in README.md

[hwipl]

No description provided.

[github-actions]

Test Result

🙌 37 Tests pass

Test Details

🟢 TestIsResolvConfEvent (0.00s)
🟢 TestWatchStartEvents (0.00s)
🟢 TestWatchStartStop (0.02s)
🟢 TestWatchStartStop/watcher_error (0.00s)
🟢 TestWatchStartStop/add_dir_error (0.00s)
🟢 TestWatchStartStop/no_errors (0.02s)
🟢 TestNewWatch (0.00s)
🟢 TestServerCheck (0.01s)
🟢 TestNewServer (0.00s)
🟢 TestWatchStartEvents (0.00s)
🟢 TestWatchStartStop (0.00s)
🟢 TestWatchStartStop/subscribe_error (0.00s)
🟢 TestWatchStartStop/no_errors (0.00s)
🟢 TestWatchProbes (0.00s)
🟢 TestNewWatch (0.00s)
🟢 TestConfigValid (0.00s)
🟢 TestNewConfig (0.00s)
🟢 TestDetectorSetGetServers (0.00s)
🟢 TestDetectorSetGetDialer (0.00s)
🟢 TestDetectorProbe (2.01s)
🟢 TestDetectorHandleProbeRequest (0.00s)
🟢 TestDetectorHandleProbeResult (0.00s)
🟢 TestDetectorHandleTimer (0.00s)
🟢 TestTNDStartStop (0.00s)
🟢 TestTNDStartStop/routes_watch_error (0.00s)
🟢 TestTNDStartStop/files_watch_error (0.00s)
🟢 TestTNDStartStop/no_errors (0.00s)
🟢 TestTNDProbe (0.00s)
🟢 TestTNDResults (0.00s)
🟢 TestNewTND (0.00s)
🟢 TestDetectorSetGetServers (0.00s)
🟢 TestDetectorSetGetDialer (0.00s)
🟢 TestDetectorStart (0.00s)
🟢 TestDetectorStop (0.00s)
🟢 TestDetectorProbe (0.00s)
🟢 TestDetectorResults (0.00s)
🟢 TestNewDetector (0.00s)

Coverage

Total coverage: 🟩🟩🟩🟥 94.8%

Coverage Details

Coverage	File	Uncovered Lines
🟩🟩🟩🟩 95.1%	/internal/files/watch.go	57-59, 69-71
🟩🟩🟩🟥 81.8%	/internal/https/server.go	40-42, 44-46, 49-53
🟩🟩🟩🟩 100.0%	/internal/routes/watch.go
🟩🟩🟩🟩 100.0%	/pkg/tnd/config.go
🟩🟩🟩🟩 95.8%	/pkg/tnd/detector.go	179-180, 183-185, 212-215, 222-222