doc/mb/lenovo/montevina: Update link within page

Commit c4aa24fc121 (doc/mb/lenovo/montevina: Clarify use of bincfg)
renamed a section, and the link referencing it by its old title no
longer works. Update the link, and remove the `a completely new one`
part from it as well, for consistency with the aforementioned commit.

Change-Id: I22e8b3237dafb3397bc901804a57e905f806839d
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51482
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/Documentation/mainboard/lenovo/montevina_series.md b/Documentation/mainboard/lenovo/montevina_series.md
index 6931808..3ff2042 100644
--- a/Documentation/mainboard/lenovo/montevina_series.md
+++ b/Documentation/mainboard/lenovo/montevina_series.md
@@ -44,7 +44,7 @@
 
 Now you need to patch the flash descriptor. You can either [modify the one from
 your backup with **ifdtool**](#modifying-flash-descriptor-using-ifdtool), or
-[generate a completely new one with **bincfg**](#creating-a-new-flash-descriptor-using-bincfg).
+[use one from the coreboot repository](#using-checked-in-flash-descriptor-via-bincfg).
 
 #### Modifying flash descriptor using ifdtool