Fix ping packet decoding

Previously, the ampersand character was incorrectly used instead of the
section sign character, which is clearly the right character according
to https://wiki.vg/Server_List_Ping#1.6 .

The mistake seems to have been introduced when the source code was first
published, but went unnoticed since an older version (which didn't
contain the mistake) was published as the final release JAR.

See also: PlaceholderAPI#2

src/main/java/com/extendedclip/papi/expansion/pinger/PingerExpansion.java

@@ -294,7 +294,7 @@ public boolean fetchData() {
                     return false;
                 }
                 String string = new String(chars);
-                if (string.startsWith("&")) {
+                if (string.startsWith("§")) {
                     String[] data = string.split("\000");
                     setPingVersion(Integer.parseInt(data[0].substring(1)));
                     setProtocolVersion(Integer.parseInt(data[1]));
@@ -303,7 +303,7 @@ public boolean fetchData() {
                     setPlayersOnline(Integer.parseInt(data[4]));
                     setMaxPlayers(Integer.parseInt(data[5]));
                 } else {
-                    String[] data = string.split("&");
+                    String[] data = string.split("§");
                     setMotd(data[0]);
                     setPlayersOnline(Integer.parseInt(data[1]));
                     setMaxPlayers(Integer.parseInt(data[2]));