Revert abbreviation of month name

Commit 6a00ff2, "Extract document version from git tag" changed the
date annotation from full month to the abbreviation. Full month looks
better on the title page, so revert that hunk of the change.

Signed-off-by: Grant Likely <[email protected]>

Author: glikely

source/conf.py

@@ -83,7 +83,7 @@ def setup(app):
 # non-false value, then it is used:
 #today = ''
 # Else, today_fmt is used as the format for a strftime call.
-today_fmt = '%d %b %Y'
+today_fmt = '%d %B %Y'
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.