man: capitalize "also" for consistency

Almost all our man pages write it that way.

man/org.freedesktop.hostname1.xml

@@ -425,7 +425,7 @@ node /org/freedesktop/hostname1 {
   </refsect1>
 
   <refsect1>
-    <title>See also</title>
+    <title>See Also</title>
 
     <para>David Zeuthen's original Fedora
     <ulink url="https://fedoraproject.org/wiki/Features/BetterHostname">Feature page about xdg-hostname</ulink></para>

man/org.freedesktop.timedate1.xml

@@ -193,7 +193,7 @@ $ gdbus introspect --system \
   <xi:include href="org.freedesktop.locale1.xml" xpointer="versioning"/>
 
   <refsect1>
-    <title>See also</title>
+    <title>See Also</title>
 
       <para><ulink url="https://lists.freedesktop.org/archives/systemd-devel/2011-May/002526.html">More information on how the system clock and RTC interact</ulink></para>
   </refsect1>

man/systemd.environment-generator.xml

@@ -122,7 +122,7 @@
   </refsect1>
 
   <refsect1>
-    <title>See also</title>
+    <title>See Also</title>
 
     <para><simplelist type="inline">
       <member><citerefentry><refentrytitle>systemd-environment-d-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry></member>

man/systemd.generator.xml

@@ -380,7 +380,7 @@ find $dir</programlisting>
   </refsect1>
 
   <refsect1>
-    <title>See also</title>
+    <title>See Also</title>
 
     <para><simplelist type="inline">
       <member><citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>

man/systemd.offline-updates.xml

@@ -157,7 +157,7 @@
   </refsect1>
 
   <refsect1>
-    <title>See also</title>
+    <title>See Also</title>
 
     <para><simplelist type="inline">
       <member><citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>