[PATCH v3 17/21] docs: PCI: pci-vntb-howto.rst: fix a title markup

As warned by Sphinx:
	Documentation/PCI/endpoint/pci-vntb-howto.rst:131: WARNING: Title underline too short.

Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
---

To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover.
See [PATCH v3 00/21] at: https://lore.kernel.org/all/cover.1657360984.git.mchehab@kernel.org/ (local)

 Documentation/PCI/endpoint/pci-vntb-howto.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/PCI/endpoint/pci-vntb-howto.rst b/Documentation/PCI/endpoint/pci-vntb-howto.rst
index b4a679144692..31a0bae868f9 100644
--- a/Documentation/PCI/endpoint/pci-vntb-howto.rst
+++ b/Documentation/PCI/endpoint/pci-vntb-howto.rst

@@ -128,7 +128,7 @@ RootComplex Device
 ==================
 
 lspci Output at Host side
-------------------------
+-------------------------
 
 Note that the devices listed here correspond to the values populated in
 "Creating pci-epf-ntb Device" section above::

-- 
2.36.1