[media.ccc.de] Escape "." in id pattern

extractor/src/main/java/org/schabi/newpipe/extractor/services/media_ccc/linkHandler/MediaCCCRecentListLinkHandlerFactory.java

@@ -6,7 +6,7 @@ import java.util.List;
 import java.util.regex.Pattern;
 
 public class MediaCCCRecentListLinkHandlerFactory extends ListLinkHandlerFactory {
-    private static final String pattern = "^(https?://)?media.ccc.de/recent/?$";
+    private static final String pattern = "^(https?://)?media\\.ccc\\.de/recent/?$";
 
     @Override
     public String getId(String url) {