Fixed the JSON parsing for some videos that include the characters "<…

…" and ">".

One such video is: https://yewtu.be/watch?v=LDAYYaV51xs

Which generated the following warning:

	[JSON]: illegal backslash escape sequence in string, at character offset 21419 (before "\\<3"}]},"trackingPa...") at /usr/share/perl5/site_perl/JSON.pm line 190.

lib/WWW/PipeViewer/InitialData.pm

@@ -679,7 +679,7 @@ sub _get_initial_data {
 
         $json =~ s{\\x([[:xdigit:]]{2})}{chr(hex($1))}ge;
         $json =~ s{\\u([[:xdigit:]]{4})}{chr(hex($1))}ge;
-        $json =~ s{\\(["&])}{$1}g;
+        $json =~ s{\\(["&<>])}{$1}g;
 
         my $hash = parse_utf8_json_string($json);
         return $hash;