BasicHttpsClient: Updated demo certificate fingerprint (#6462)

The previous certificate had already expired, I swapped it with the current one.

Author: iscle

libraries/ESP8266HTTPClient/examples/BasicHttpsClient/BasicHttpsClient.ino

@@ -13,8 +13,8 @@
 #include <ESP8266HTTPClient.h>
 
 #include <WiFiClientSecureBearSSL.h>
-// Fingerprint for demo URL, expires on June 2, 2019, needs to be updated well before this date
-const uint8_t fingerprint[20] = {0x5A, 0xCF, 0xFE, 0xF0, 0xF1, 0xA6, 0xF4, 0x5F, 0xD2, 0x11, 0x11, 0xC6, 0x1D, 0x2F, 0x0E, 0xBC, 0x39, 0x8D, 0x50, 0xE0};
+// Fingerprint for demo URL, expires on June 2, 2021, needs to be updated well before this date
+const uint8_t fingerprint[20] = {0x40, 0xaf, 0x00, 0x6b, 0xec, 0x90, 0x22, 0x41, 0x8e, 0xa3, 0xad, 0xfa, 0x1a, 0xe8, 0x25, 0x41, 0x1d, 0x1a, 0x54, 0xb3};
 
 ESP8266WiFiMulti WiFiMulti;