[YouTube] add new deobfuscation function name regex

Adds a new regex to find the name of the deobfuscation function for throttling,
which works for the `59b252b9` player.

Closes: TeamNewPipe#1289

Author: FineFindus

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeThrottlingParameterUtils.java

@@ -28,6 +28,13 @@ final class YoutubeThrottlingParameterUtils {
 
     // CHECKSTYLE:OFF
     private static final Pattern[] DEOBFUSCATION_FUNCTION_NAME_REGEXES = {
+            /*
+             * Matches the following text, where we want m85:
+             *
+             * m85=function( ... return Y[45]
+             */
+            Pattern.compile("([A-Za-z0-9_\\$]{2,})=function.*return [A-Z]\\[\\d+\\]"),
+
 
             /*
              * Matches the following text, where we want SDa and the array index accessed: