media: dt-bindings: Fix vendor-prefixes YAML

Commit 8df39e16 ("media: dt-bindings: media: Add vendor prefix for
allegro") introduced a new devicetree binding vendors, however with an
improper syntax making the resulting YAML impossible to parse. Let's fix
this.

Fixes: 8df39e16 ("media: dt-bindings: media: Add vendor prefix for allegro")
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -49,7 +49,7 @@ patternProperties:
     description: Aeroflex Gaisler AB
   "^al,.*":
     description: Annapurna Labs
-  "^allegro,.*"
+  "^allegro,.*":
     description: Allegro DVT
   "^allo,.*":
     description: Allo.com