Fixed spelling mistake

src/main/java/com/cringe_studios/cringe_authenticator_library/OTP.java

@@ -56,7 +56,7 @@ public abstract class OTP {
 	
 	/**
 	 * 
-	 * @return s the current ping, as calculated by the counter or the current time, unless it
+	 * @return s the current pin, as calculated by the counter or the current time, unless it
 	 * @throws an OTPException
 	 */
 	public abstract String getPin() throws OTPException;