Capture dollar sign (#109)

fixes c548b3da
https://discord.com/channels/1082302532421943407/1343974517621653645/1343974517621653645

Author: WeeeeeeeeeeS

common/src/main/java/dev/lavalink/youtube/cipher/SignatureCipherManager.java

@@ -45,7 +45,7 @@
 public class SignatureCipherManager {
   private static final Logger log = LoggerFactory.getLogger(SignatureCipherManager.class);
 
-  private static final String VARIABLE_PART = "[a-zA-Z_\\$][a-zA-Z_0-9]*";
+  private static final String VARIABLE_PART = "[a-zA-Z_\\$][a-zA-Z_0-9\\$]*";
   private static final String VARIABLE_PART_DEFINE = "\\\"?" + VARIABLE_PART + "\\\"?";
   private static final String BEFORE_ACCESS = "(?:\\[\\\"|\\.)";
   private static final String AFTER_ACCESS = "(?:\\\"\\]|)";