Missing updates for release

Signed-off-by: Frediano Ziglio <freddy77@gmail.com>

Author: freddy77

README.md

@@ -1,7 +1,7 @@
 README for FreeTDS 1.4
 ====
 
-*Release date TBD*
+*Release date 23th September 2023*
 
 **To build FreeTDS read the file [INSTALL](./INSTALL.md) or
 the [FreeTDS Users Guide](http://www.freetds.org/userguide/)**

configure.ac

@@ -11,7 +11,7 @@ dnl ------------------------------------------------------------
 # ------------------------------------------------------------
 # Initialization
 # ------------------------------------------------------------
-AC_INIT(FreeTDS, 1.4rc1)
+AC_INIT(FreeTDS, 1.4)
 AC_CONFIG_SRCDIR(src/dblib/dblib.c)
 AC_PREREQ(2.53)