rc(8): angle brackets to avoid link breakage

<https://datatracker.ietf.org/doc/html/rfc3986#appendix-C>

Double-quotes are not suitably effective. Instead, use angle brackets.

Whilst here:
- remove superfluous quotation marks from the %T title.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/811

share/man/man8/rc.8

@@ -28,7 +28,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd June 1, 2023
+.Dd December 27,2023
 .Dt RC 8
 .Os
 .Sh NAME
@@ -582,8 +582,8 @@ is unnecessary, but is often included.
 .Xr sysrc 8
 .Pp
 .Rs
-.%T "Practical rc.d scripting in BSD"
-.%U "https://docs.freebsd.org/en/articles/rc-scripting/"
+.%T Practical rc.d scripting in BSD
+.%U <https://docs.freebsd.org/en/articles/rc-scripting/>
 .Re
 .Sh HISTORY
 The