[gdb/doc] Fix print inferior-events default

In the docs about print inferior-events we read:
...
By default, these messages will not be printed.
...

That used to be the case, but is no longer so since commit f67c0c91715 "Enable
'set print inferior-events' and improve detach/fork/kill/exit messages".

Fix this by updating the docs.

---
 gdb/doc/gdb.texinfo | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 1700b0305c5..d53c9a03704 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -3395,7 +3395,7 @@ control use @w{@code{set print inferior-events}}:
 The @code{set print inferior-events} command allows you to enable or
 disable printing of messages when @value{GDBN} notices that new
 inferiors have started or that inferiors have exited or have been
-detached.  By default, these messages will not be printed.
+detached.  By default, these messages will be printed.
 
 @kindex show print inferior-events
 @item show print inferior-events