Merge branch 'fix-history-page-title' into 'master'

Fix the History page title

See merge request Librem5/developer.puri.sm!327

Introduction/History.rst

 .. _history:
 
-History of the Librem5
-======================
+History of the Librem 5
+=======================
 
 Developing a dev kit and eventually a phone is a long process that 
 requires many hardware iterations over time to test and determine