ci(docker): add vale to the main docker image

Add vale to the main image so we can reuse this container for vale's ci
workflow to save some time.

Signed-off-by: Randolph Sapp <rs@ti.com>

Author: StaticRocket

docker/Dockerfile

@@ -13,6 +13,7 @@ RUN apk add --no-cache \
 		ripgrep \
 		shadow \
 		su-exec \
+		vale \
 		zip \
 	&& echo "**** create abc user and make our folders ****" \
 	&& useradd -u 1000 -U -d /config -s /bin/false abc \