Added missing import

Author: Peyton-Hill-CLS

app/logbook/inmemory/src/main/java/org/phoebus/applications/logbook/InMemoryLogClient.java

@@ -23,6 +23,7 @@
 import java.io.InputStream;
 import java.net.URLConnection;
 import java.nio.file.Files;
+import java.nio.file.StandardCopyOption;
 import java.time.Instant;
 import java.util.Arrays;
 import java.util.Collection;