certctl.8: Update documentation of BUNDLE

- Fix a typo.
- Provide the default path.

Reviewed by:	des
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D53001

usr.sbin/certctl/certctl.8

@@ -24,7 +24,7 @@
 .\" IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd August 18, 2025
+.Dd October 9, 2025
 .Dt CERTCTL 8
 .Os
 .Sh NAME
@@ -110,7 +110,7 @@ A copy of each trusted certificate is placed in
 and each untrusted certificate in
 .Ev UNTRUSTDESTDIR .
 In addition, a bundle containing the trusted certificates is placed in
-.Ev BUNDLEFILE .
+.Ev BUNDLE .
 .It Ic untrust
 Add the specified file to the untrusted list.
 .It Ic trust
@@ -151,6 +151,8 @@ Default:
 .Pa ${DESTDIR}${DISTBASE}/etc/ssl/untrusted
 .It Ev BUNDLE
 File name of bundle to produce.
+Default:
+.Pa ${DESTDIR}${DISTBASE}/etc/ssl/cert.pem
 .El
 .Sh SEE ALSO
 .Xr openssl 1