doc: x86/speculation: length of underlines

The lengths of underlines must match the titles to avoid build warnings.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Mark Gross<mgross@linux.intel.com>
Link: https://lore.kernel.org/r/20200615203645.11545-1-xypron.glpk@gmx.de
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Heinrich Schuchardt 2020-06-15 22:36:45 +02:00 • committed by Jonathan Corbet
commit 10857a01ab