Fix title of the documentation (#25)

Author: cpina

docs/source/index.rst

@@ -1,10 +1,7 @@
-.. python-ring-doorbell documentation master file, created by
-   sphinx-quickstart on Fri Sep 22 17:28:31 2023.
-   You can adapt this file completely to your liking, but it should at least
-   contain the root `toctree` directive.
+.. firebase-messaging documentation master file
 
-Welcome to python-ring-doorbell's documentation!
-================================================
+Welcome to firebase-messaging documentation!
+============================================
 
 .. include:: ../../README.rst