Update of fingerprint

[mival]

fix #506

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[mival]

@googlebot I signed it!

[mival]

I use https://www.grc.com/fingerprints.htm page for get fingerprint. That page was mentioned in some other issue. May by that fingerprint is different for each project, based on server region. You can try search and use fingerprint for your project firebase server (https://`project name`.firebaseio.com/)

[matt-schrader]

This patch saved my brew day. I can confirm it fixes communication with Firebase!

[TrickSumo]

@paxsipornax

Use library by Mobizt to fix it permanently :- https://github.com/mobizt/Firebase-ESP8266/

https://youtu.be/nLzC0-VaqDs