docs: fix NAME sections manual pages for correct whatis(1) parsing

Reference used was WHATIS PARSING section in lexgrog(1).

This change enables the manual page to be returned with a whatis(1)
query:

 $ whatis meli
 meli (1)             - terminal e-mail client

docs/meli-themes.5

@@ -17,14 +17,14 @@
 .\" You should have received a copy of the GNU General Public License
 .\" along with meli. If not, see <http://www.gnu.org/licenses/>.
 .\"
-.Dd January 23, 2020
+.Dd November 11, 2022
 .Dt MELI-THEMES 5
 .Os
 .Sh NAME
 .Nm meli-themes
 .Nd themes for the
-.Nm meli
-mail client
+.Xr meli 1
+terminal e-mail client
 .Sh SYNOPSIS
 .Nm meli
 comes with two themes,

docs/meli.1

@@ -40,12 +40,14 @@
 .Ed
 .sp
 ..
-.Dd July 29, 2019
+.Dd November 11, 2022
 .Dt MELI 1
 .Os
 .Sh NAME
 .Nm meli
-.Nd Meli Mail User Agent. meli is the Greek word for honey
+.Nd terminal e-mail client
+.Em μέλι
+is the Greek word for honey
 .Sh SYNOPSIS
 .Nm
 .Op Fl -help | h

docs/meli.7

@@ -44,12 +44,12 @@
 .Cm \\$*
 .Ed
 ..
-.Dd September 4, 2022
+.Dd November 11, 2022
 .Dt MELI 7
 .Os
 .Sh NAME
 .Nm meli
-.Nd Tutorial for the Meli Mail User Agent
+.Nd Tutorial for the meli terminal e-mail client
 .Sh SYNOPSIS
 .Nm
 .Op ...

docs/meli.conf.5

@@ -17,12 +17,14 @@
 .\" You should have received a copy of the GNU General Public License
 .\" along with meli. If not, see <http://www.gnu.org/licenses/>.
 .\"
-.Dd September 16, 2019
+.Dd November 11, 2022
 .Dt MELI.CONF 5
 .Os
 .Sh NAME
 .Nm meli.conf
-.Nd configuration file for the Meli Mail User Agent
+.Nd configuration file for the
+.Xr meli 1
+terminal e-mail client
 .Sh SYNOPSIS
 .Pa $XDG_CONFIG_HOME/meli/config.toml
 .Sh DESCRIPTION