handbook/l10n: Correct reference to csh login file

The l10n chapter directs people to add things to ~/.csh.login but
testing reveals that ~/.login is the right path.

This has also been corroborated by dtrace, and the csh(1) manual page
also refers to ~/.login.

PR:		253758

documentation/content/en/books/handbook/l10n/_index.adoc

@@ -245,7 +245,7 @@ LANG=de_DE.ISO8859-1; export LANG
 MM_CHARSET=ISO-8859-1; export MM_CHARSET
 ....
 
-However, the name of the configuration file and the syntax used differs for the `csh` shell. These are the equivalent settings for [.filename]#~/.csh.login#, [.filename]#/etc/csh.login#, or [.filename]#/usr/share/skel/dot.login#:
+However, the name of the configuration file and the syntax used differs for the `csh` shell. These are the equivalent settings for [.filename]#~/.login#, [.filename]#/etc/csh.login#, or [.filename]#/usr/share/skel/dot.login#:
 
 [.programlisting]
 ....