doc: fix home dir path in common.conf

* doc/examples/common.conf: fix home dir path

--

Fix a few typos in user-specific path of common.conf added in d13c5bc
(gpg,gpgsm: Move use-keyboxd to the new conf file common.conf,
2021-04-19).  The file is in the GnuPG home dir.  Replace 'use if' with
'use of' as well.

Signed-off-by: Todd Zullinger <[email protected]>

Author: Todd Zullinger via Gnupg-devel

doc/examples/common.conf

@@ -3,10 +3,10 @@
 # This file may provide defaults as well as options which needs to be
 # synchronized between components.  As usual this file is read from
 # the system wide config directory (e.g. /etc/gnupg/common.conf) as
-# well as from the home directory (e.g. ~/.gnupg.common.conf).
+# well as from the home directory (e.g. ~/.gnupg/common.conf).
 
 
-# Uncomment to enable the use if the keybox daemon (keyboxd) by gpg
+# Uncomment to enable the use of the keybox daemon (keyboxd) by gpg
 # and gpgsm.
 #use-keyboxd