[YouTube] Fix extraction of YouTube Music client version and API key when using YouTube Music's website in EU

Google returns now the consent page of YouTube for YouTube Music in EU, which can be also avoided by adding the ucbcb parameter to the URL with the value 1 ("?ucbcb=1").

Author: AudricV

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

@@ -853,7 +853,7 @@ public static String[] getYoutubeMusicKey()
                 musicKey = getStringResultFromRegexArray(response, INNERTUBE_API_KEY_REGEXES, 1);
                 musicClientName = Parser.matchGroup1(INNERTUBE_CLIENT_NAME_REGEX, response);
         } catch (final Exception e) {
-            final String url = "https://music.youtube.com/";
+            final String url = "https://music.youtube.com/?ucbcb=1";
             final Map<String, List<String>> headers = new HashMap<>();
             addCookieHeader(headers);
             final String html = getDownloader().get(url, headers).responseBody();