docs: fix context_*_range (3) return value documentation

The context_*_range () family of functions return less than zero on
failure[1][2].

[1] https://github.com/SELinuxProject/selinux/blob/main/libselinux/src/context.c#L184
[2] https://github.com/SELinuxProject/selinux/blob/main/libselinux/src/context.c#L190

Signed-off-by: Rahul Sandhu <[email protected]>
Acked-by: Stephen Smalley <[email protected]>

Author: WavyEbuilder

libselinux/man/man3/context_new.3

@@ -71,7 +71,7 @@ set a context component.
 .SH "RETURN VALUE"
 On failure
 .BR context_*_set ()
-functions return non-zero and 0 on success.
+functions return non-zero on failure and 0 on success.
 
 The other functions return NULL on failure and non-NULL on success.