sane.7.html: Fix typo in stv680 backend name

man/sane.7.html

@@ -450,8 +450,8 @@
          Backend for Connectix QuickCam cameras. See <B><A HREF="sane-qcam.5.html">sane-qcam(5)</A></B>.
 
        <B>stv680</B>
-         The sane-st680 backend provides access to webcams with a stv680 chip.
-         See <B><A HREF="sane-st680.5.html">sane-st680(5)</A></B> for details.
+         The sane-stv680 backend provides access to webcams with a stv680 chip.
+         See <B><A HREF="sane-stv680.5.html">sane-stv680(5)</A></B> for details.
 
        Also,    have   a   look   at   the   backend   information   page   at
        <I>http://www.sane-project.org/sane-supported-devices.html</I> and the list of