MAINTAINERS: update nvidia,tegra20-host1x.yaml reference

Changeset fd27de58b0ad ("dt-bindings: display: tegra: Convert to json-schema")
renamed: Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
to: Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.yaml.

Update its cross-reference accordingly.

Fixes: fd27de58b0ad ("dt-bindings: display: tegra: Convert to json-schema")
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Link: https://lore.kernel.org/r/e0adee01fe8064f981eb854e04fb64c4a0408b66.1656234456.git.mchehab@kernel.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

MAINTAINERS

@@ -6714,7 +6714,7 @@ L:	dri-devel@lists.freedesktop.org
 L:	linux-tegra@vger.kernel.org
 S:	Supported
 T:	git git://anongit.freedesktop.org/tegra/linux.git
-F:	Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
+F:	Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.yaml
 F:	Documentation/devicetree/bindings/gpu/host1x/
 F:	drivers/gpu/drm/tegra/
 F:	drivers/gpu/host1x/
@@ -19647,7 +19647,7 @@ M:	Sowjanya Komatineni <skomatineni@nvidia.com>
 L:	linux-media@vger.kernel.org
 L:	linux-tegra@vger.kernel.org
 S:	Maintained
-F:	Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.txt
+F:	Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.yaml
 F:	drivers/staging/media/tegra-video/
 
 TEGRA XUSB PADCTL DRIVER