docs: fix all end of file newlines

Note: Some files are autogenerated and I did not yet
go through each source of generation to fix it there.
Instead I adjusted the filter to only exclude those
such that we can fix things in steps.

docs/en/flight_modes/index.md

@@ -12,4 +12,4 @@ For information about flight modes available to specific frames see the followin
 ::: info
 The mode sub-topics in this section contain information that is common to all vehicles, but may not be relevant to the normal/default setup.
 Generally you should see the vehicle-specific topics first, and navigate to these generalized topics when it becomes relevant.
-:::
+:::