doc: Update doc regarding 'setstate'

[Bruno Haible]

On Solaris 11.4 (both x86 and sparc based), I see this warning:
gltests/test-random.c:24:18: warning: initialization of 'char * (*)(char *)' 
from incompatible pointer type 'char * (*)(const char *)' 
[-Wincompatible-pointer-types]

Let me update the doc. The warning is not worth silencing.


2023-06-25  Bruno Haible  <bruno@clisp.org>

        doc: Update doc regarding 'setstate'.
        * doc/posix-functions/setstate.texi: Mention also Solaris 11.4.

diff --git a/doc/posix-functions/setstate.texi 
b/doc/posix-functions/setstate.texi
index 826533f881..554d67d667 100644
--- a/doc/posix-functions/setstate.texi
+++ b/doc/posix-functions/setstate.texi
@@ -21,5 +21,5 @@
 @item
 This function has a slightly incompatible declaration (the argument type being
 @samp{const char *} instead of @samp{char *}) on some platforms:
-macOS 11.1, AIX 7.1, HP-UX 11.31, IRIX 6.5, Solaris 11 OpenIndiana.
+macOS 11.1, AIX 7.1, HP-UX 11.31, IRIX 6.5, Solaris 11.4, Solaris 11 
OpenIndiana.
 @end itemize